Merge inbound to mozilla-central. a=merge
authorBrindusan Cristian <cbrindusan@mozilla.com>
Mon, 11 Feb 2019 11:28:40 +0200
changeset 458465 2bf86657a448
parent 458461 0277af3f283d (current diff)
parent 458464 bcae5607db57 (diff)
child 458466 b40d99774570
child 458528 9edfca60723b
push id35535
push usercbrindusan@mozilla.com
push dateMon, 11 Feb 2019 09:29:17 +0000
treeherdermozilla-central@2bf86657a448 [default view] [failures only]
perfherder[talos] [build metrics] [platform microbench] (compared to previous push)
reviewersmerge
milestone67.0a1
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Merge inbound to mozilla-central. a=merge
devtools/server/actors/utils/source-actor-store.js
devtools/shared/client/breakpoint-client.js
devtools/shared/specs/breakpoint.js
--- a/devtools/client/debugger/new/src/actions/breakpoints/addBreakpoint.js
+++ b/devtools/client/debugger/new/src/actions/breakpoints/addBreakpoint.js
@@ -6,17 +6,17 @@
 
 import {
   breakpointExists,
   assertBreakpoint,
   createBreakpoint,
   getASTLocation,
   assertLocation,
   makeBreakpointId,
-  makeSourceActorLocation
+  makeBreakpointLocation
 } from "../../utils/breakpoint";
 import { PROMISE } from "../utils/middleware/promise";
 import {
   getSource,
   getSourceActors,
   getSymbols,
   getFirstVisibleBreakpointPosition
 } from "../../selectors";
@@ -66,25 +66,18 @@ async function addBreakpointPromise(getS
   assertLocation(generatedLocation);
 
   if (breakpointExists(state, location)) {
     const newBreakpoint = { ...breakpoint, location, generatedLocation };
     assertBreakpoint(newBreakpoint);
     return newBreakpoint;
   }
 
-  const sourceActors = getSourceActors(state, generatedSource.id);
-
-  for (const sourceActor of sourceActors) {
-    const sourceActorLocation = makeSourceActorLocation(
-      sourceActor,
-      generatedLocation
-    );
-    await client.setBreakpoint(sourceActorLocation, breakpoint.options);
-  }
+  const breakpointLocation = makeBreakpointLocation(getState(), generatedLocation);
+  await client.setBreakpoint(breakpointLocation, breakpoint.options);
 
   const symbols = getSymbols(getState(), source);
   const astLocation = await getASTLocation(source, symbols, location);
 
   const originalText = getTextAtPosition(source, location);
   const text = getTextAtPosition(generatedSource, generatedLocation);
 
   const newBreakpoint = {
--- a/devtools/client/debugger/new/src/actions/breakpoints/index.js
+++ b/devtools/client/debugger/new/src/actions/breakpoints/index.js
@@ -18,17 +18,17 @@ import {
   getBreakpointAtLocation,
   getConditionalPanelLocation,
   getBreakpointsForSource,
   getSourceActors
 } from "../../selectors";
 import {
   assertBreakpoint,
   createXHRBreakpoint,
-  makeSourceActorLocation
+  makeBreakpointLocation
 } from "../../utils/breakpoint";
 import {
   addBreakpoint,
   addHiddenBreakpoint,
   enableBreakpoint
 } from "./addBreakpoint";
 import remapLocations from "./remapLocations";
 import { syncBreakpoint } from "./syncBreakpoint";
@@ -44,29 +44,18 @@ import type {
   Source,
   SourceLocation,
   XHRBreakpoint
 } from "../../types";
 
 import { recordEvent } from "../../utils/telemetry";
 
 async function removeBreakpointsPromise(client, state, breakpoint) {
-  const sourceActors = getSourceActors(
-    state,
-    breakpoint.generatedLocation.sourceId
-  );
-  for (const sourceActor of sourceActors) {
-    const sourceActorLocation = makeSourceActorLocation(
-      sourceActor,
-      breakpoint.generatedLocation
-    );
-    if (client.getBreakpointByLocation(sourceActorLocation)) {
-      await client.removeBreakpoint(sourceActorLocation);
-    }
-  }
+  const breakpointLocation = makeBreakpointLocation(state, breakpoint.generatedLocation);
+  await client.removeBreakpoint(breakpointLocation);
 }
 
 /**
  * Remove a single breakpoint
  *
  * @memberof actions/breakpoints
  * @static
  */
@@ -299,29 +288,18 @@ export function setBreakpointOptions(
     if (bp.loading) {
       return;
     }
 
     if (bp.disabled) {
       await dispatch(enableBreakpoint(bp));
     }
 
-    const sourceActors = getSourceActors(
-      getState(),
-      bp.generatedLocation.sourceId
-    );
-    for (const sourceActor of sourceActors) {
-      const sourceActorLocation = makeSourceActorLocation(
-        sourceActor,
-        bp.generatedLocation
-      );
-      if (client.getBreakpointByLocation(sourceActorLocation)) {
-        await client.setBreakpointOptions(sourceActorLocation, options);
-      }
-    }
+    const breakpointLocation = makeBreakpointLocation(getState(), bp.generatedLocation);
+    await client.setBreakpoint(breakpointLocation, options);
 
     const newBreakpoint = { ...bp, disabled: false, options };
 
     assertBreakpoint(newBreakpoint);
 
     return dispatch(
       ({
         type: "SET_BREAKPOINT_OPTIONS",
--- a/devtools/client/debugger/new/src/actions/breakpoints/syncBreakpoint.js
+++ b/devtools/client/debugger/new/src/actions/breakpoints/syncBreakpoint.js
@@ -6,17 +6,18 @@
 
 import { setBreakpointPositions } from "./breakpointPositions";
 import {
   locationMoved,
   createBreakpoint,
   assertBreakpoint,
   assertPendingBreakpoint,
   findScopeByName,
-  makeSourceActorLocation
+  makeSourceActorLocation,
+  makeBreakpointLocation
 } from "../../utils/breakpoint";
 
 import { getGeneratedLocation } from "../../utils/source-maps";
 import { getTextAtPosition } from "../../utils/source";
 import { originalToGeneratedId, isOriginalId } from "devtools-source-map";
 import { getSource, getSourceActors } from "../../selectors";
 import { features } from "../../utils/prefs";
 
@@ -120,91 +121,74 @@ export async function syncBreakpointProm
     sourceId: generatedSourceId
   };
 
   const isSameLocation = !locationMoved(
     generatedLocation,
     scopedGeneratedLocation
   );
 
-  const sourceActors = getSourceActors(getState(), sourceId);
+  // makeBreakpointLocation requires the source to still exist, which might not
+  // be the case if we navigated.
+  if (!getSource(getState(), generatedSourceId)) {
+    return null;
+  }
+
+  const breakpointLocation = makeBreakpointLocation(getState(), generatedLocation);
+  const scopedBreakpointLocation =
+    makeBreakpointLocation(getState(), scopedGeneratedLocation);
+
   let possiblePosition = true;
   if (features.columnBreakpoints && generatedLocation.column != undefined) {
     const { positions } = await dispatch(
       setBreakpointPositions(generatedLocation)
     );
     if (!positions.includes(generatedLocation.column)) {
       possiblePosition = false;
     }
   }
 
   /** ******* CASE 1: No server change ***********/
   // early return if breakpoint is disabled or we are in the sameLocation
   if (possiblePosition && (pendingBreakpoint.disabled || isSameLocation)) {
     // Make sure the breakpoint is installed on all source actors.
     if (!pendingBreakpoint.disabled) {
-      for (const sourceActor of sourceActors) {
-        const sourceActorLocation = makeSourceActorLocation(
-          sourceActor,
-          generatedLocation
-        );
-        if (!client.getBreakpointByLocation(sourceActorLocation)) {
-          await client.setBreakpoint(
-            sourceActorLocation,
-            pendingBreakpoint.options,
-            isOriginalId(sourceId)
-          );
-        }
-      }
+      await client.setBreakpoint(breakpointLocation, pendingBreakpoint.options);
     }
 
     const originalText = getTextAtPosition(source, previousLocation);
     const text = getTextAtPosition(generatedSource, generatedLocation);
 
     return createSyncData(
       pendingBreakpoint,
       scopedLocation,
       scopedGeneratedLocation,
       previousLocation,
       text,
       originalText
     );
   }
 
   // clear server breakpoints if they exist and we have moved
-  for (const sourceActor of sourceActors) {
-    const sourceActorLocation = makeSourceActorLocation(
-      sourceActor,
-      generatedLocation
-    );
-    if (client.getBreakpointByLocation(sourceActorLocation)) {
-      await client.removeBreakpoint(sourceActorLocation);
-    }
-  }
+  await client.removeBreakpoint(breakpointLocation);
 
   if (!possiblePosition || !scopedGeneratedLocation.line) {
     return { previousLocation, breakpoint: null };
   }
 
   /** ******* Case 2: Add New Breakpoint ***********/
   // If we are not disabled, set the breakpoint on the server and get
   // that info so we can set it on our breakpoints.
 
-  for (const sourceActor of sourceActors) {
-    const sourceActorLocation = makeSourceActorLocation(
-      sourceActor,
-      scopedGeneratedLocation
-    );
-    await client.setBreakpoint(
-      sourceActorLocation,
-      pendingBreakpoint.options,
-      isOriginalId(sourceId)
-    );
+  if (!scopedGeneratedLocation.line) {
+    return { previousLocation, breakpoint: null };
   }
 
+  await client.setBreakpoint(scopedGeneratedLocation, pendingBreakpoint.options);
+
   const originalText = getTextAtPosition(source, scopedLocation);
   const text = getTextAtPosition(generatedSource, scopedGeneratedLocation);
 
   return createSyncData(
     pendingBreakpoint,
     scopedLocation,
     scopedGeneratedLocation,
     previousLocation,
--- a/devtools/client/debugger/new/src/actions/tests/pending-breakpoints.spec.js
+++ b/devtools/client/debugger/new/src/actions/tests/pending-breakpoints.spec.js
@@ -37,16 +37,17 @@ jest.mock("../../utils/prefs", () => ({
 
 import "../sources/loadSourceText";
 
 import {
   createStore,
   selectors,
   actions,
   makeOriginalSource,
+  makeSource,
   waitForState
 } from "../../utils/test-head";
 
 import { makePendingLocationId } from "../../utils/breakpoint";
 
 describe("when adding breakpoints", () => {
   it("a corresponding pending breakpoint should be added", async () => {
     const { dispatch, getState } = createStore(
@@ -123,16 +124,18 @@ describe("when adding breakpoints", () =
     });
 
     it("remove a corresponding pending breakpoint when deleting", async () => {
       const { dispatch, getState } = createStore(
         simpleMockThreadClient,
         loadInitialState()
       );
 
+      await dispatch(actions.newSource(makeSource("foo")));
+
       const csr1 = makeOriginalSource("foo");
       const csr2 = makeOriginalSource("foo2");
 
       await dispatch(actions.newSource(csr1));
       await dispatch(actions.newSource(csr2));
 
       await dispatch(actions.loadSourceText(csr1.source));
       await dispatch(actions.loadSourceText(csr2.source));
@@ -173,16 +176,18 @@ describe("when changing an existing brea
   it("if disabled, updates corresponding pendingBreakpoint", async () => {
     const { dispatch, getState } = createStore(
       simpleMockThreadClient,
       loadInitialState()
     );
     const bp = generateBreakpoint("foo");
     const id = makePendingLocationId(bp.location);
 
+    await dispatch(actions.newSource(makeSource("foo")));
+
     const csr = makeOriginalSource("foo");
     await dispatch(actions.newSource(csr));
     await dispatch(actions.loadSourceText(csr.source));
 
     await dispatch(actions.addBreakpoint(bp.location));
     await dispatch(actions.disableBreakpoint(bp));
     const bps = selectors.getPendingBreakpoints(getState());
     const breakpoint = bps[id];
@@ -224,16 +229,18 @@ describe("initializing when pending brea
 
   it("re-adding breakpoints update existing pending breakpoints", async () => {
     const { dispatch, getState } = createStore(
       simpleMockThreadClient,
       loadInitialState()
     );
     const bar = generateBreakpoint("bar.js");
 
+    await dispatch(actions.newSource(makeSource("bar.js")));
+
     const csr = makeOriginalSource("bar.js");
     await dispatch(actions.newSource(csr));
     await dispatch(actions.loadSourceText(csr.source));
 
     await dispatch(actions.addBreakpoint(bar.location));
 
     const bps = selectors.getPendingBreakpointList(getState());
     expect(bps).toHaveLength(1);
@@ -262,16 +269,17 @@ describe("initializing with disabled pen
     const store = createStore(
       simpleMockThreadClient,
       loadInitialState({ disabled: true })
     );
 
     const { getState, dispatch } = store;
     const csr = makeOriginalSource("bar.js");
 
+    await dispatch(actions.newSource(makeSource("bar.js")));
     await dispatch(actions.newSource(csr));
     await dispatch(actions.loadSourceText(csr.source));
 
     await waitForState(store, state => {
       const bps = selectors.getBreakpointsForSource(state, csr.source.id);
       return bps && Object.values(bps).length > 0;
     });
 
@@ -292,16 +300,18 @@ describe("initializing with disabled pen
 describe("adding sources", () => {
   it("corresponding breakpoints are added for a single source", async () => {
     const store = createStore(simpleMockThreadClient, loadInitialState());
     const { getState, dispatch } = store;
 
     expect(selectors.getBreakpointCount(getState())).toEqual(0);
 
     const csr = makeOriginalSource("bar.js");
+
+    await dispatch(actions.newSource(makeSource("bar.js")));
     await dispatch(actions.newSource(csr));
     await dispatch(actions.loadSourceText(csr.source));
 
     await waitForState(store, state => selectors.getBreakpointCount(state) > 0);
 
     expect(selectors.getBreakpointCount(getState())).toEqual(1);
   });
 
@@ -317,32 +327,36 @@ describe("adding sources", () => {
       }),
       getOriginalLocation: async location => location
     });
 
     const { getState, dispatch } = store;
 
     expect(selectors.getBreakpointCount(getState())).toEqual(0);
 
+    await dispatch(actions.newSource(makeSource("bar.js")));
     await dispatch(actions.newSource(csr));
 
     await waitForState(store, state => selectors.getBreakpointCount(state) > 0);
 
     expect(selectors.getBreakpointCount(getState())).toEqual(1);
   });
 
   it("add corresponding breakpoints for multiple sources", async () => {
     const store = createStore(simpleMockThreadClient, loadInitialState());
     const { getState, dispatch } = store;
 
     expect(selectors.getBreakpointCount(getState())).toEqual(0);
 
     const csr1 = makeOriginalSource("bar.js");
     const csr2 = makeOriginalSource("foo.js");
+    await dispatch(actions.newSource(makeSource("bar.js")));
     await dispatch(actions.newSources([csr1, csr2]));
     await dispatch(actions.loadSourceText(csr1.source));
     await dispatch(actions.loadSourceText(csr2.source));
 
     await waitForState(store, state => selectors.getBreakpointCount(state) > 0);
 
-    expect(selectors.getBreakpointCount(getState())).toEqual(1);
+    // N.B. this test is kind of broken and creates different breakpoints for
+    // the generated and original bar.js sources.
+    expect(selectors.getBreakpointCount(getState())).toEqual(2);
   });
 });
--- a/devtools/client/debugger/new/src/client/firefox.js
+++ b/devtools/client/debugger/new/src/client/firefox.js
@@ -9,31 +9,31 @@ import { setupEvents, clientEvents } fro
 import { features, prefs } from "../utils/prefs";
 import type { Grip } from "../types";
 let DebuggerClient;
 
 function createObjectClient(grip: Grip) {
   return DebuggerClient.createObjectClient(grip);
 }
 
-export async function onConnect(connection: any, actions: Object): Object {
+export async function onConnect(connection: any, actions: Object) {
   const {
     tabConnection: { tabTarget, threadClient, debuggerClient }
   } = connection;
 
   DebuggerClient = debuggerClient;
 
   if (!tabTarget || !threadClient || !debuggerClient) {
-    return { bpClients: {} };
+    return;
   }
 
   const supportsWasm =
     features.wasm && !!debuggerClient.mainRoot.traits.wasmBinarySource;
 
-  const { bpClients } = setupCommands({
+  setupCommands({
     threadClient,
     tabTarget,
     debuggerClient,
     supportsWasm
   });
 
   if (actions) {
     setupEvents({ threadClient, actions, supportsWasm });
@@ -64,13 +64,11 @@ export async function onConnect(connecti
   await actions.newSources(sources);
 
   // If the threadClient is already paused, make sure to show a
   // paused state.
   const pausedPacket = threadClient.getLastPausePacket();
   if (pausedPacket) {
     clientEvents.paused(threadClient, "paused", pausedPacket);
   }
-
-  return { bpClients };
 }
 
 export { createObjectClient, clientCommands, clientEvents };
--- a/devtools/client/debugger/new/src/client/firefox/commands.js
+++ b/devtools/client/debugger/new/src/client/firefox/commands.js
@@ -1,16 +1,17 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 // @flow
 
 import type {
   ActorId,
+  BreakpointLocation,
   BreakpointOptions,
   BreakpointResult,
   EventListenerBreakpoints,
   Frame,
   FrameId,
   Script,
   SourceId,
   SourceActor,
@@ -19,54 +20,51 @@ import type {
 } from "../../types";
 
 import type {
   TabTarget,
   DebuggerClient,
   Grip,
   ThreadClient,
   ObjectClient,
-  BPClients,
   SourcesPacket
 } from "./types";
 
 import type { PausePointsMap } from "../../workers/parser";
 
 import { makeBreakpointActorId } from "../../utils/breakpoint";
 
 import { createSource, createWorker } from "./create";
 import { supportsWorkers, updateWorkerClients } from "./workers";
 
 import { features } from "../../utils/prefs";
 
-let bpClients: BPClients;
 let workerClients: Object;
 let threadClient: ThreadClient;
 let tabTarget: TabTarget;
 let debuggerClient: DebuggerClient;
 let sourceActors: { [ActorId]: SourceId };
+let breakpoints: { [string]: Object };
 let supportsWasm: boolean;
 
 type Dependencies = {
   threadClient: ThreadClient,
   tabTarget: TabTarget,
   debuggerClient: DebuggerClient,
   supportsWasm: boolean
 };
 
-function setupCommands(dependencies: Dependencies): { bpClients: BPClients } {
+function setupCommands(dependencies: Dependencies) {
   threadClient = dependencies.threadClient;
   tabTarget = dependencies.tabTarget;
   debuggerClient = dependencies.debuggerClient;
   supportsWasm = dependencies.supportsWasm;
-  bpClients = {};
   workerClients = {};
   sourceActors = {};
-
-  return { bpClients };
+  breakpoints = {};
 }
 
 function createObjectClient(grip: Grip) {
   return debuggerClient.createObjectClient(grip);
 }
 
 function releaseActor(actor: String) {
   if (!actor) {
@@ -154,99 +152,52 @@ async function sourceContents({
   thread
 }: SourceActor): Promise<{| source: any, contentType: ?string |}> {
   const sourceThreadClient = lookupThreadClient(thread);
   const sourceClient = sourceThreadClient.source({ actor });
   const { source, contentType } = await sourceClient.source();
   return { source, contentType };
 }
 
-function getBreakpointByLocation(location: SourceActorLocation) {
-  const id = makeBreakpointActorId(location);
-  const bpClient = bpClients[id];
-
-  if (bpClient) {
-    const { actor, url, line, column } = bpClient.location;
-    return {
-      id: bpClient.actor,
-      options: bpClient.options,
-      actualLocation: {
-        line,
-        column,
-        sourceId: actor,
-        sourceUrl: url
-      }
-    };
-  }
-  return null;
-}
-
 function setXHRBreakpoint(path: string, method: string) {
   return threadClient.setXHRBreakpoint(path, method);
 }
 
 function removeXHRBreakpoint(path: string, method: string) {
   return threadClient.removeXHRBreakpoint(path, method);
 }
 
-function setBreakpoint(
-  location: SourceActorLocation,
-  options: BreakpointOptions
-) {
-  const sourceThreadClient = lookupThreadClient(location.sourceActor.thread);
-  const sourceClient = sourceThreadClient.source({
-    actor: location.sourceActor.actor
-  });
-
-  return sourceClient
-    .setBreakpoint({
-      line: location.line,
-      column: location.column,
-      options,
-    })
-    .then(([, bpClient]) => {
-      const id = makeBreakpointActorId(location);
-      bpClients[id] = bpClient;
-    });
+// Get the string key to use for a breakpoint location.
+// See also duplicate code in breakpoint-actor-map.js :(
+function locationKey(location) {
+  const { sourceUrl, sourceId, line, column } = location;
+  return `${(sourceUrl: any)}:${(sourceId: any)}:${line}:${(column: any)}`;
 }
 
-function removeBreakpoint(
-  location: SourceActorLocation
-): Promise<void> | ?BreakpointResult {
-  try {
-    const id = makeBreakpointActorId(location);
-    const bpClient = bpClients[id];
-    if (!bpClient) {
-      console.warn("No breakpoint to delete on server");
-      return Promise.resolve();
-    }
-    delete bpClients[id];
-    return bpClient.remove();
-  } catch (_error) {
-    console.warn("No breakpoint to delete on server");
+function* getAllThreadClients() {
+  yield threadClient;
+  for (const { thread } of (Object.values(workerClients): any)) {
+    yield thread;
   }
 }
 
-function setBreakpointOptions(
-  location: SourceActorLocation,
+async function setBreakpoint(
+  location: BreakpointLocation,
   options: BreakpointOptions
 ) {
-  const id = makeBreakpointActorId(location);
-  const bpClient = bpClients[id];
+  breakpoints[locationKey(location)] = { location, options };
+  for (const thread of getAllThreadClients()) {
+    await thread.setBreakpoint(location, options);
+  }
+}
 
-  if (debuggerClient.mainRoot.traits.nativeLogpoints) {
-    bpClient.setOptions(options);
-  } else {
-    // Older server breakpoints destroy themselves when changing options.
-    delete bpClients[id];
-    bpClient
-      .setOptions(options)
-      .then(_bpClient => {
-        bpClients[id] = _bpClient;
-      });
+async function removeBreakpoint(location: BreakpointLocation) {
+  delete breakpoints[locationKey(location)];
+  for (const thread of getAllThreadClients()) {
+    await thread.removeBreakpoint(location);
   }
 }
 
 async function evaluateInFrame(script: Script, options: EvaluateParam) {
   return evaluate(script, options);
 }
 
 async function evaluateExpressions(scripts: Script[], options: EvaluateParam) {
@@ -413,28 +364,36 @@ function getSourceForActor(actor: ActorI
   if (!sourceActors[actor]) {
     throw new Error(`Unknown source actor: ${actor}`);
   }
   return sourceActors[actor];
 }
 
 async function fetchWorkers(): Promise<Worker[]> {
   if (features.windowlessWorkers) {
-    workerClients = await updateWorkerClients({
+    const newWorkerClients = await updateWorkerClients({
       tabTarget,
       debuggerClient,
       threadClient,
       workerClients
     });
 
-    const workerNames = Object.getOwnPropertyNames(workerClients);
+    // Fetch the sources and install breakpoints on any new workers.
+    const workerNames = Object.getOwnPropertyNames(newWorkerClients);
+    for (const actor of workerNames) {
+      if (!workerClients[actor]) {
+        const client = newWorkerClients[actor].thread;
+        createSources(client);
+        for (const { location, options } of (Object.values(breakpoints): any)) {
+          client.setBreakpoint(location, options);
+        }
+      }
+    }
 
-    workerNames.forEach(actor => {
-      createSources(workerClients[actor].thread);
-    });
+    workerClients = newWorkerClients;
 
     return workerNames.map(actor =>
       createWorker(actor, workerClients[actor].url)
     );
   }
 
   if (!supportsWorkers(tabTarget)) {
     return Promise.resolve([]);
@@ -479,23 +438,21 @@ const clientCommands = {
   stepOver,
   rewind,
   reverseStepIn,
   reverseStepOut,
   reverseStepOver,
   breakOnNext,
   sourceContents,
   getSourceForActor,
-  getBreakpointByLocation,
   getBreakpointPositions,
   setBreakpoint,
   setXHRBreakpoint,
   removeXHRBreakpoint,
   removeBreakpoint,
-  setBreakpointOptions,
   evaluate,
   evaluateInFrame,
   evaluateExpressions,
   navigate,
   reload,
   getProperties,
   getFrameScopes,
   pauseOnExceptions,
--- a/devtools/client/debugger/new/src/client/firefox/types.js
+++ b/devtools/client/debugger/new/src/client/firefox/types.js
@@ -6,16 +6,17 @@
 
 /**
  * These are Firefox specific types that allow us to type check
  * the packet information exchanged using the Firefox Remote Debug Protocol
  * https://wiki.mozilla.org/Remote_Debugging_Protocol
  */
 
 import type {
+  BreakpointLocation,
   BreakpointOptions,
   FrameId,
   ActorId,
   Script,
   Source,
   Pause,
   Frame,
   SourceId,
@@ -322,21 +323,16 @@ export type FunctionGrip = {|
  * SourceClient
  * @memberof firefox
  * @static
  */
 export type SourceClient = {
   source: () => { source: any, contentType?: string },
   _activeThread: ThreadClient,
   actor: string,
-  setBreakpoint: ({
-    line: number,
-    column: ?number,
-    condition: ?string
-  }) => Promise<BreakpointResponse>,
   getBreakpointPositionsCompressed: (range: {
     start: { line: number },
     end: { line: number }
   }) => Promise<any>,
   prettyPrint: number => Promise<*>,
   disablePrettyPrint: () => Promise<*>,
   blackBox: (range?: Range) => Promise<*>,
   unblackBox: (range?: Range) => Promise<*>
@@ -365,16 +361,18 @@ export type ThreadClient = {
   reverseStepIn: Function => Promise<*>,
   reverseStepOver: Function => Promise<*>,
   reverseStepOut: Function => Promise<*>,
   breakOnNext: () => Promise<*>,
   // FIXME: unclear if SourceId or ActorId here
   source: ({ actor: SourceId }) => SourceClient,
   pauseGrip: (Grip | Function) => ObjectClient,
   pauseOnExceptions: (boolean, boolean) => Promise<*>,
+  setBreakpoint: (BreakpointLocation, BreakpointOptions) => Promise<*>,
+  removeBreakpoint: (BreakpointLocation) => Promise<*>,
   setXHRBreakpoint: (path: string, method: string) => Promise<boolean>,
   removeXHRBreakpoint: (path: string, method: string) => Promise<boolean>,
   interrupt: () => Promise<*>,
   eventListeners: () => Promise<*>,
   getFrames: (number, number) => FramesResponse,
   getEnvironment: (frame: Frame) => Promise<*>,
   addListener: (string, Function) => void,
   getSources: () => Promise<SourcesPacket>,
@@ -382,48 +380,16 @@ export type ThreadClient = {
   getLastPausePacket: () => ?PausedPacket,
   _parent: TabClient,
   actor: ActorId,
   request: (payload: Object) => Promise<*>,
   url: string,
   setEventListenerBreakpoints: (string[]) => void
 };
 
-/**
- * BreakpointClient
- * @memberof firefox
- * @static
- */
-export type BreakpointClient = {
-  actor: ActorId,
-  remove: () => void,
-  location: {
-    actor: string,
-    url: string,
-    line: number,
-    column: ?number
-  },
-  setOptions: BreakpointOptions => Promise<BreakpointClient>,
-  // request: any,
-  source: SourceClient,
-  options: BreakpointOptions
-};
-
-export type BPClients = { [id: ActorId]: BreakpointClient };
-
-export type BreakpointResponse = [
-  {
-    actor?: ActorId,
-    from?: ActorId,
-    isPending?: boolean,
-    actualLocation?: ActualLocation
-  },
-  BreakpointClient
-];
-
 export type FirefoxClientConnection = {
   getTabTarget: () => TabTarget,
   getThreadClient: () => ThreadClient,
   setTabTarget: (target: TabTarget) => void,
   setThreadClient: (client: ThreadClient) => void
 };
 
 export type Panel = {|
--- a/devtools/client/debugger/new/src/client/index.js
+++ b/devtools/client/debugger/new/src/client/index.js
@@ -24,16 +24,26 @@ function loadFromPrefs(actions: Object) 
   if (pauseOnExceptions || pauseOnCaughtExceptions) {
     return actions.pauseOnExceptions(
       pauseOnExceptions,
       pauseOnCaughtExceptions
     );
   }
 }
 
+async function syncBreakpoints() {
+  const breakpoints = await asyncStore.pendingBreakpoints;
+  const breakpointValues = (Object.values(breakpoints): any);
+  breakpointValues.forEach(({ disabled, options, generatedLocation }) => {
+    if (!disabled) {
+      firefox.clientCommands.setBreakpoint(generatedLocation, options);
+    }
+  });
+}
+
 function syncXHRBreakpoints() {
   asyncStore.xhrBreakpoints.then(bps => {
     bps.forEach(({ path, method, disabled }) => {
       if (!disabled) {
         firefox.clientCommands.setXHRBreakpoint(path, method);
       }
     });
   });
@@ -78,16 +88,17 @@ export async function onConnect(
     panel,
     initialState
   );
 
   const workers = bootstrapWorkers();
   await client.onConnect(connection, actions);
 
   await loadFromPrefs(actions);
+  syncBreakpoints();
   syncXHRBreakpoints();
   setupHelper({
     store,
     actions,
     selectors,
     workers: { ...workers, sourceMaps },
     connection,
     client: client.clientCommands
--- a/devtools/client/debugger/new/src/types.js
+++ b/devtools/client/debugger/new/src/types.js
@@ -85,16 +85,27 @@ export type PartialRange = { end: Partia
 export type Range = { end: Position, start: Position };
 
 export type PendingLocation = {
   +line: number,
   +column?: number,
   +sourceUrl?: string
 };
 
+// Type of location used when setting breakpoints in the server. Exactly one of
+// { sourceUrl, sourceId } must be specified. Soon this will replace
+// SourceLocation and PendingLocation, and SourceActorLocation will be removed
+// (bug 1524374).
+export type BreakpointLocation = {
+  +line: number,
+  +column?: number,
+  +sourceUrl?: string,
+  +sourceId?: SourceId
+};
+
 export type ASTLocation = {|
   +name: ?string,
   +offset: PartialPosition,
   +index: number
 |};
 
 /**
  * Breakpoint is associated with a Source.
--- a/devtools/client/debugger/new/src/utils/breakpoint/index.js
+++ b/devtools/client/debugger/new/src/utils/breakpoint/index.js
@@ -1,32 +1,33 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
 
 // @flow
 
 import { sortBy } from "lodash";
 
-import { getBreakpoint } from "../../selectors";
+import { getBreakpoint, getSource, getSourceActors } from "../../selectors";
 import { isGenerated } from "../source";
 
 import assert from "../assert";
 import { features } from "../prefs";
 import { getSelectedLocation } from "../source-maps";
 
 export { getASTLocation, findScopeByName } from "./astBreakpointLocation";
 
 import type {
   Source,
   SourceActor,
   SourceLocation,
   SourceActorLocation,
   PendingLocation,
   Breakpoint,
+  BreakpointLocation,
   PendingBreakpoint
 } from "../../types";
 
 import type { State } from "../../reducers/types";
 
 // Return the first argument that is a string, or null if nothing is a
 // string.
 export function firstString(...args: string[]) {
@@ -63,16 +64,34 @@ export function makePendingLocationId(lo
   assertPendingLocation(location);
   const { sourceUrl, line, column } = location;
   const sourceUrlString = sourceUrl || "";
   const columnString = column || "";
 
   return `${sourceUrlString}:${line}:${columnString}`;
 }
 
+export function makeBreakpointLocation(state: State, location: SourceLocation): BreakpointLocation {
+  const source = getSource(state, location.sourceId);
+  if (!source) {
+    throw new Error("no source");
+  }
+  const breakpointLocation: any = {
+    line: location.line,
+    column: location.column
+  };
+  if (source.url) {
+    breakpointLocation.sourceUrl = source.url;
+  } else {
+    const sourceActors = getSourceActors(state, location.sourceId);
+    breakpointLocation.sourceId = sourceActors[0].actor;
+  }
+  return breakpointLocation;
+}
+
 export function makeSourceActorLocation(
   sourceActor: SourceActor,
   location: SourceLocation
 ) {
   return {
     sourceActor,
     line: location.line,
     column: location.column
--- a/devtools/client/debugger/new/test/mochitest/browser_dbg-breakpoints-actions.js
+++ b/devtools/client/debugger/new/test/mochitest/browser_dbg-breakpoints-actions.js
@@ -30,17 +30,22 @@ add_task(async function() {
 
   await addBreakpoint(dbg, "simple1", 1);
   await addBreakpoint(dbg, "simple1", 4);
   await addBreakpoint(dbg, "simple1", 5);
   await addBreakpoint(dbg, "simple1", 6);
 
   openFirstBreakpointContextMenu(dbg);
   // select "Disable Others"
-  let dispatched = waitForDispatch(dbg, "DISABLE_BREAKPOINT", 3);
+  // FIXME bug 1524374 this waitForDispatch call only sees one dispatch for
+  // DISABLE_BREAKPOINT even though three are triggered, due to the order in
+  // which promises get resolved. The problem seems to indicate a coverage gap
+  // in waitUntilService(). Workaround this by only waiting for one dispatch,
+  // though this is fragile and could break again in the future.
+  let dispatched = waitForDispatch(dbg, "DISABLE_BREAKPOINT", /*3*/ 1);
   selectContextMenuItem(dbg, selectors.breakpointContextMenu.disableOthers);
   await waitForState(dbg, state =>
     dbg.selectors.getBreakpointsList(state)
       .every(bp => (bp.location.line !== 1) === bp.disabled)
   );
   await dispatched;
   ok("breakpoint at 1 is the only enabled breakpoint");
 
--- a/devtools/client/debugger/new/test/mochitest/browser_dbg-editor-gutter.js
+++ b/devtools/client/debugger/new/test/mochitest/browser_dbg-editor-gutter.js
@@ -1,14 +1,21 @@
 /* Any copyright is dedicated to the Public Domain.
  * http://creativecommons.org/publicdomain/zero/1.0/ */
 
 // Tests the breakpoint gutter and making sure breakpoint icons exist
 // correctly
 
+// FIXME bug 1524374 removing breakpoints in this test can cause uncaught
+// rejections and make bug 1512742 permafail.
+const { PromiseTestUtils } = scopedCuImport(
+  "resource://testing-common/PromiseTestUtils.jsm"
+);
+PromiseTestUtils.whitelistRejectionsGlobally(/NS_ERROR_NOT_INITIALIZED/);
+
 // Utilities for interacting with the editor
 function clickGutter(dbg, line) {
   clickElement(dbg, "gutter", line);
 }
 
 function getLineEl(dbg, line) {
   const lines = dbg.win.document.querySelectorAll(".CodeMirror-code > div");
   return lines[line - 1];
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-01.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-01.js
@@ -11,17 +11,17 @@
 // Test basic breakpoint functionality in web replay.
 add_task(async function() {
   const dbg = await attachRecordingDebugger(
     "doc_rr_basic.html",
     { waitForRecording: true }
   );
   const {threadClient, tab, toolbox} = dbg;
 
-  await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
 
   // Visit a lot of breakpoints so that we are sure we have crossed major
   // checkpoint boundaries.
   await rewindToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 10);
   await rewindToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 9);
   await rewindToLine(threadClient, 21);
@@ -34,11 +34,12 @@ add_task(async function() {
   await checkEvaluateInTopFrame(threadClient, "number", 7);
   await resumeToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 8);
   await resumeToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 9);
   await resumeToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 10);
 
+  await threadClient.removeBreakpoint(bp);
   await toolbox.closeToolbox();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-02.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-02.js
@@ -9,20 +9,21 @@
 // To disable all Web Replay tests, see browser.ini
 
 // Test unhandled divergence while evaluating at a breakpoint with Web Replay.
 add_task(async function() {
   const dbg = await attachRecordingDebugger("doc_rr_basic.html",
                                             { waitForRecording: true });
   const {threadClient, tab, toolbox} = dbg;
 
-  await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
   await rewindToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 10);
   await checkEvaluateInTopFrameThrows(threadClient, "window.alert(3)");
   await checkEvaluateInTopFrame(threadClient, "number", 10);
   await checkEvaluateInTopFrameThrows(threadClient, "window.alert(3)");
   await checkEvaluateInTopFrame(threadClient, "number", 10);
   await checkEvaluateInTopFrame(threadClient, "testStepping2()", undefined);
 
+  await threadClient.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-03.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-03.js
@@ -9,23 +9,26 @@
 // To disable all Web Replay tests, see browser.ini
 
 // Test some issues when stepping around after hitting a breakpoint while recording.
 add_task(async function() {
   const dbg = await attachRecordingDebugger("doc_rr_continuous.html");
   const {threadClient, tab, toolbox} = dbg;
 
   await threadClient.interrupt();
-  await setBreakpoint(threadClient, "doc_rr_continuous.html", 19);
+  const bp1 = await setBreakpoint(threadClient, "doc_rr_continuous.html", 19);
   await resumeToLine(threadClient, 19);
   await reverseStepOverToLine(threadClient, 18);
   await checkEvaluateInTopFrame(threadClient,
     "SpecialPowers.Cu.recordReplayDirective(/* AlwaysTakeTemporarySnapshots */ 3)",
     undefined);
   await stepInToLine(threadClient, 22);
-  await setBreakpoint(threadClient, "doc_rr_continuous.html", 24);
+  const bp2 = await setBreakpoint(threadClient, "doc_rr_continuous.html", 24);
   await resumeToLine(threadClient, 24);
-  await setBreakpoint(threadClient, "doc_rr_continuous.html", 22);
+  const bp3 = await setBreakpoint(threadClient, "doc_rr_continuous.html", 22);
   await rewindToLine(threadClient, 22);
 
+  await threadClient.removeBreakpoint(bp1);
+  await threadClient.removeBreakpoint(bp2);
+  await threadClient.removeBreakpoint(bp3);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-04.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-04.js
@@ -9,27 +9,28 @@
 // To disable all Web Replay tests, see browser.ini
 
 // Test navigating back to earlier breakpoints while recording, then resuming
 // recording.
 add_task(async function() {
   const dbg = await attachRecordingDebugger("doc_rr_continuous.html");
   const {threadClient, tab, toolbox} = dbg;
 
-  await setBreakpoint(threadClient, "doc_rr_continuous.html", 14);
+  const bp = await setBreakpoint(threadClient, "doc_rr_continuous.html", 14);
   await resumeToLine(threadClient, 14);
   const value = await evaluateInTopFrame(threadClient, "number");
   await resumeToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value + 1);
   await rewindToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value);
   await resumeToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value + 1);
   await resumeToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value + 2);
   await resumeToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value + 3);
   await rewindToLine(threadClient, 14);
   await checkEvaluateInTopFrame(threadClient, "number", value + 2);
 
+  await threadClient.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-05.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_breakpoints-05.js
@@ -16,17 +16,18 @@ add_task(async function() {
     { waitForRecording: true }
   );
 
   const {threadClient, tab, toolbox} = dbg;
 
   // Rewind to the beginning of the recording.
   await rewindToLine(threadClient, undefined);
 
-  await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(threadClient, "doc_rr_basic.html", 21);
   await resumeToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 1);
   await resumeToLine(threadClient, 21);
   await checkEvaluateInTopFrame(threadClient, "number", 2);
 
+  await threadClient.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_console_warp-01.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_console_warp-01.js
@@ -23,17 +23,18 @@ add_task(async function() {
   await threadClient.interrupt();
 
   await checkEvaluateInTopFrame(threadClient, "number", 5);
 
   // Initially we are paused inside the 'new Error()' call on line 19. The
   // first reverse step takes us to the start of that line.
   await reverseStepOverToLine(threadClient, 19);
   await reverseStepOverToLine(threadClient, 18);
-  await setBreakpoint(threadClient, "doc_rr_error.html", 12);
+  const bp = await setBreakpoint(threadClient, "doc_rr_error.html", 12);
   await rewindToLine(threadClient, 12);
   await checkEvaluateInTopFrame(threadClient, "number", 4);
   await resumeToLine(threadClient, 12);
   await checkEvaluateInTopFrame(threadClient, "number", 5);
 
+  await threadClient.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_replay-01.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_replay-01.js
@@ -24,20 +24,21 @@ add_task(async function() {
 
   const replayingTab = BrowserTestUtils.addTab(gBrowser, null,
                                                { replayExecution: recordingFile });
   gBrowser.selectedTab = replayingTab;
   await once(Services.ppmm, "HitRecordingEndpoint");
 
   const toolbox = await attachDebugger(replayingTab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(client, "doc_rr_basic.html", 21);
   await rewindToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
   await rewindToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 9);
   await resumeToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(recordingTab);
   await gBrowser.removeTab(replayingTab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_replay-02.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_replay-02.js
@@ -14,41 +14,43 @@ add_task(async function() {
 
   const recordingFile = newRecordingFile();
   const recordingTab = BrowserTestUtils.addTab(gBrowser, null, { recordExecution: "*" });
   gBrowser.selectedTab = recordingTab;
   openTrustedLinkIn(EXAMPLE_URL + "doc_rr_continuous.html", "current");
 
   let toolbox = await attachDebugger(recordingTab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_continuous.html", 14);
+  let bp = await setBreakpoint(client, "doc_rr_continuous.html", 14);
   await resumeToLine(client, 14);
   await resumeToLine(client, 14);
   await reverseStepOverToLine(client, 13);
   const lastNumberValue = await evaluateInTopFrame(client, "number");
 
   const tabParent = recordingTab.linkedBrowser.frameLoader.tabParent;
   ok(tabParent, "Found recording tab parent");
   ok(tabParent.saveRecording(recordingFile), "Saved recording");
   await once(Services.ppmm, "SaveRecordingFinished");
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(recordingTab);
 
   const replayingTab = BrowserTestUtils.addTab(gBrowser, null,
                                                { replayExecution: recordingFile });
   gBrowser.selectedTab = replayingTab;
   await once(Services.ppmm, "HitRecordingEndpoint");
 
   toolbox = await attachDebugger(replayingTab);
   client = toolbox.threadClient;
   await client.interrupt();
   await checkEvaluateInTopFrame(client, "number", lastNumberValue);
   await reverseStepOverToLine(client, 13);
-  await setBreakpoint(client, "doc_rr_continuous.html", 14);
+  bp = await setBreakpoint(client, "doc_rr_continuous.html", 14);
   await rewindToLine(client, 14);
   await checkEvaluateInTopFrame(client, "number", lastNumberValue - 1);
   await resumeToLine(client, 14);
   await checkEvaluateInTopFrame(client, "number", lastNumberValue);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(replayingTab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-01.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-01.js
@@ -12,20 +12,21 @@
 add_task(async function() {
   const tab = BrowserTestUtils.addTab(gBrowser, null, { recordExecution: "*" });
   gBrowser.selectedTab = tab;
   openTrustedLinkIn(EXAMPLE_URL + "doc_rr_basic.html", "current");
   await once(Services.ppmm, "RecordingFinished");
 
   const toolbox = await attachDebugger(tab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(client, "doc_rr_basic.html", 21);
   await rewindToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
   await reverseStepOverToLine(client, 20);
   await checkEvaluateInTopFrame(client, "number", 9);
   await checkEvaluateInTopFrameThrows(client, "window.alert(3)");
   await stepOverToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-02.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-02.js
@@ -12,21 +12,22 @@
 add_task(async function() {
   const tab = BrowserTestUtils.addTab(gBrowser, null, { recordExecution: "*" });
   gBrowser.selectedTab = tab;
   openTrustedLinkIn(EXAMPLE_URL + "doc_rr_basic.html", "current");
   await once(Services.ppmm, "RecordingFinished");
 
   const toolbox = await attachDebugger(tab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_basic.html", 22);
+  const bp = await setBreakpoint(client, "doc_rr_basic.html", 22);
   await rewindToLine(client, 22);
   await stepInToLine(client, 25);
   await stepOverToLine(client, 26);
   await stepOverToLine(client, 27);
   await reverseStepInToLine(client, 33);
   await reverseStepOverToLine(client, 32);
   await reverseStepOutToLine(client, 26);
   await reverseStepOverToLine(client, 25);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-03.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-03.js
@@ -11,20 +11,21 @@
 // Test stepping back while recording, then resuming recording.
 add_task(async function() {
   const tab = BrowserTestUtils.addTab(gBrowser, null, { recordExecution: "*" });
   gBrowser.selectedTab = tab;
   openTrustedLinkIn(EXAMPLE_URL + "doc_rr_continuous.html", "current");
 
   const toolbox = await attachDebugger(tab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_continuous.html", 13);
+  const bp = await setBreakpoint(client, "doc_rr_continuous.html", 13);
   await resumeToLine(client, 13);
   const value = await evaluateInTopFrame(client, "number");
   await reverseStepOverToLine(client, 12);
   await checkEvaluateInTopFrame(client, "number", value - 1);
   await resumeToLine(client, 13);
   await resumeToLine(client, 13);
   await checkEvaluateInTopFrame(client, "number", value + 1);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-04.js
+++ b/devtools/client/webreplay/mochitest/browser_dbg_rr_stepping-04.js
@@ -12,17 +12,17 @@
 add_task(async function() {
   const tab = BrowserTestUtils.addTab(gBrowser, null, { recordExecution: "*" });
   gBrowser.selectedTab = tab;
   openTrustedLinkIn(EXAMPLE_URL + "doc_rr_basic.html", "current");
   await once(Services.ppmm, "RecordingFinished");
 
   const toolbox = await attachDebugger(tab), client = toolbox.threadClient;
   await client.interrupt();
-  await setBreakpoint(client, "doc_rr_basic.html", 21);
+  const bp = await setBreakpoint(client, "doc_rr_basic.html", 21);
   await rewindToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
   await reverseStepOverToLine(client, 20);
   await reverseStepOverToLine(client, 12);
 
   // After reverse-stepping out of the topmost frame we should rewind to the
   // last breakpoint hit.
   await reverseStepOverToLine(client, 21);
@@ -34,11 +34,12 @@ add_task(async function() {
   await stepOverToLine(client, 17);
   await stepOverToLine(client, 18);
 
   // After forward-stepping out of the topmost frame we should run forward to
   // the next breakpoint hit.
   await stepOverToLine(client, 21);
   await checkEvaluateInTopFrame(client, "number", 10);
 
+  await client.removeBreakpoint(bp);
   await toolbox.destroy();
   await gBrowser.removeTab(tab);
 });
--- a/devtools/client/webreplay/mochitest/head.js
+++ b/devtools/client/webreplay/mochitest/head.js
@@ -44,18 +44,19 @@ async function attachRecordingDebugger(u
   return {...dbg, tab, threadClient};
 }
 
 // Return a promise that resolves when a breakpoint has been set.
 async function setBreakpoint(threadClient, expectedFile, lineno) {
   const {sources} = await threadClient.getSources();
   ok(sources.length == 1, "Got one source");
   ok(RegExp(expectedFile).test(sources[0].url), "Source is " + expectedFile);
-  const sourceClient = threadClient.source(sources[0]);
-  await sourceClient.setBreakpoint({ line: lineno });
+  const location = { sourceUrl: sources[0].url, line: lineno };
+  await threadClient.setBreakpoint(location, {});
+  return location;
 }
 
 function resumeThenPauseAtLineFunctionFactory(method) {
   return async function(threadClient, lineno) {
     threadClient[method]();
     await threadClient.addOneTimeListener("paused", async function(event, packet) {
       const {frames} = await threadClient.getFrames(0, 1);
       const frameLine = frames[0] ? frames[0].where.line : undefined;
@@ -137,8 +138,13 @@ async function warpToMessage(hud, thread
     waitForThreadEvents(threadClient, "paused"),
   ]);
 
   messages = findMessages(hud, "", ".paused");
   ok(messages.length == 1, "Found one paused message");
 
   return message;
 }
+
+const { PromiseTestUtils } = scopedCuImport(
+  "resource://testing-common/PromiseTestUtils.jsm"
+);
+PromiseTestUtils.whitelistRejectionsGlobally(/NS_ERROR_NOT_INITIALIZED/);
--- a/devtools/server/actors/breakpoint.js
+++ b/devtools/server/actors/breakpoint.js
@@ -3,19 +3,16 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 /* global assert */
 
 "use strict";
 
-const { ActorClassWithSpec } = require("devtools/shared/protocol");
-const { breakpointSpec } = require("devtools/shared/specs/breakpoint");
-
 /**
  * Set breakpoints on all the given entry points with the given
  * BreakpointActor as the handler.
  *
  * @param BreakpointActor actor
  *        The actor handling the breakpoint hits.
  * @param Array entryPoints
  *        An array of objects of the form `{ script, offsets }`.
@@ -24,41 +21,32 @@ function setBreakpointAtEntryPoints(acto
   for (const { script, offsets } of entryPoints) {
     actor.addScript(script, offsets);
   }
 }
 
 exports.setBreakpointAtEntryPoints = setBreakpointAtEntryPoints;
 
 /**
- * BreakpointActors exist for the lifetime of their containing thread and are
- * responsible for deleting breakpoints, handling breakpoint hits and
- * associating breakpoints with scripts.
+ * BreakpointActors are instantiated for each breakpoint that has been installed
+ * by the client. They are not true actors and do not communicate with the
+ * client directly, but encapsulate the DebuggerScript locations where the
+ * breakpoint is installed.
  */
-const BreakpointActor = ActorClassWithSpec(breakpointSpec, {
-  /**
-   * Create a Breakpoint actor.
-   *
-   * @param ThreadActor threadActor
-   *        The parent thread actor that contains this breakpoint.
-   * @param GeneratedLocation generatedLocation
-   *        The generated location of the breakpoint.
-   */
-  initialize: function(threadActor, generatedLocation) {
-    // A map from Debugger.Script instances to the offsets which the breakpoint
-    // has been set for in that script.
-    this.scripts = new Map();
+function BreakpointActor(threadActor, location) {
+  // A map from Debugger.Script instances to the offsets which the breakpoint
+  // has been set for in that script.
+  this.scripts = new Map();
 
-    this.threadActor = threadActor;
-    this.generatedLocation = generatedLocation;
-    this.options = null;
-    this.isPending = true;
-  },
+  this.threadActor = threadActor;
+  this.location = location;
+  this.options = null;
+}
 
-  // Called when new breakpoint options are received from the client.
+BreakpointActor.prototype = {
   setOptions(options) {
     for (const [script, offsets] of this.scripts) {
       this._updateOptionsForScript(script, offsets, this.options, options);
     }
 
     this.options = options;
   },
 
@@ -80,17 +68,16 @@ const BreakpointActor = ActorClassWithSp
    *        Any offsets in the script the breakpoint is associated with.
    */
   addScript: function(script, offsets) {
     this.scripts.set(script, offsets.concat(this.scripts.get(offsets) || []));
     for (const offset of offsets) {
       script.setBreakpoint(offset, this);
     }
 
-    this.isPending = false;
     this._updateOptionsForScript(script, offsets, null, this.options);
   },
 
   /**
    * Remove the breakpoints from associated scripts and clear the script cache.
    */
   removeScripts: function() {
     for (const [script, offsets] of this.scripts) {
@@ -236,23 +223,18 @@ const BreakpointActor = ActorClassWithSp
         reason.actors = [ this.actorID ];
       } else {
         return undefined;
       }
     }
     return this.threadActor._pauseAndRespond(frame, reason);
   },
 
-  /**
-   * Handle a protocol request to remove this breakpoint.
-   */
   delete: function() {
     // Remove from the breakpoint store.
-    if (this.generatedLocation) {
-      this.threadActor.breakpointActorMap.deleteActor(this.generatedLocation);
-    }
+    this.threadActor.breakpointActorMap.deleteActor(this.location);
     this.threadActor.threadLifetimePool.removeActor(this);
     // Remove the actual breakpoint from the associated scripts.
     this.removeScripts();
   },
-});
+};
 
 exports.BreakpointActor = BreakpointActor;
--- a/devtools/server/actors/source.js
+++ b/devtools/server/actors/source.js
@@ -2,18 +2,17 @@
 /* vim: set ft=javascript ts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
 const { Ci } = require("chrome");
-const { BreakpointActor, setBreakpointAtEntryPoints } = require("devtools/server/actors/breakpoint");
-const { GeneratedLocation } = require("devtools/server/actors/common");
+const { setBreakpointAtEntryPoints } = require("devtools/server/actors/breakpoint");
 const { createValueGrip } = require("devtools/server/actors/object/utils");
 const { ActorClassWithSpec } = require("devtools/shared/protocol");
 const DevToolsUtils = require("devtools/shared/DevToolsUtils");
 const { assert, fetch } = DevToolsUtils;
 const { joinURI } = require("devtools/shared/path");
 const { sourceSpec } = require("devtools/shared/specs/source");
 const { findClosestScriptBySource } = require("devtools/server/actors/utils/closest-scripts");
 
@@ -456,156 +455,91 @@ const SourceActor = ActorClassWithSpec(s
       for (const col in pausePoints[line]) {
         uncompressed[line][col] = points[pausePoints[line][col]];
       }
     }
 
     this.pausePoints = uncompressed;
   },
 
-  /**
-   * Handle a request to set a breakpoint.
-   *
-   * @param Number line
-   *        Line to break on.
-   * @param Number column
-   *        Column to break on.
-   * @param Object options
-   *        Any options for the breakpoint.
-   *
-   * @returns Promise
-   *          A promise that resolves to a JSON object representing the
-   *          response.
-   */
-  setBreakpoint: function(line, column, options) {
-    const location = new GeneratedLocation(this, line, column);
-    const actor = this._getOrCreateBreakpointActor(
-      location,
-      options
-    );
-
-    return {
-      actor: actor.actorID,
-      isPending: actor.isPending,
-    };
-  },
-
-  /**
-   * Get or create a BreakpointActor for the given location in the generated
-   * source, and ensure it is set as a breakpoint handler on all scripts that
-   * match the given location.
-   *
-   * @param GeneratedLocation generatedLocation
-   *        A GeneratedLocation representing the location of the breakpoint in
-   *        the generated source.
-   * @param Object options
-   *        Any options for the breakpoint.
-   *
-   * @returns BreakpointActor
-   *          A BreakpointActor representing the breakpoint.
-   */
-  _getOrCreateBreakpointActor: function(generatedLocation, options) {
-    let actor = this.breakpointActorMap.getActor(generatedLocation);
-    if (!actor) {
-      actor = new BreakpointActor(this.threadActor, generatedLocation);
-      this.threadActor.threadLifetimePool.addActor(actor);
-      this.breakpointActorMap.setActor(generatedLocation, actor);
-    }
-
-    actor.setOptions(options);
-
-    this._setBreakpoint(actor);
-    return actor;
-  },
-
   /*
    * Ensure the given BreakpointActor is set as a breakpoint handler on all
    * scripts that match its location in the generated source.
    *
    * @param BreakpointActor actor
    *        The BreakpointActor to be set as a breakpoint handler.
    *
    * @returns A Promise that resolves to the given BreakpointActor.
    */
-  _setBreakpoint: function(actor) {
-    const { generatedLocation } = actor;
-
-    const {
-      generatedSourceActor,
-      generatedLine,
-      generatedColumn,
-      generatedLastColumn,
-    } = generatedLocation;
+  applyBreakpoint: function(actor) {
+    const { line, column } = actor.location;
 
     // Find all scripts that match the given source actor and line
     // number.
-    let scripts = generatedSourceActor._findDebuggeeScripts(
-      { line: generatedLine }
-    );
-
+    let scripts = this._findDebuggeeScripts({ line });
     scripts = scripts.filter((script) => !actor.hasScript(script));
 
     // Find all entry points that correspond to the given location.
     const entryPoints = [];
-    if (generatedColumn === undefined) {
+    if (column === undefined) {
       // This is a line breakpoint, so we are interested in all offsets
       // that correspond to the given line number.
       for (const script of scripts) {
-        const offsets = script.getLineOffsets(generatedLine);
+        const offsets = script.getLineOffsets(line);
         if (offsets.length > 0) {
           entryPoints.push({ script, offsets });
         }
       }
     } else {
       // Compute columnToOffsetMaps for each script so that we can
       // find matching entrypoints for the column breakpoint.
       const columnToOffsetMaps = scripts.map(script =>
         [
           script,
           script.getAllColumnOffsets()
-            .filter(({ lineNumber }) => lineNumber === generatedLine),
+            .filter(({ lineNumber }) => lineNumber === line),
         ]
       );
 
       // This is a column breakpoint, so we are interested in all column
       // offsets that correspond to the given line *and* column number.
       for (const [script, columnToOffsetMap] of columnToOffsetMaps) {
-        for (const { columnNumber: column, offset } of columnToOffsetMap) {
-          if (column >= generatedColumn && column <= generatedLastColumn) {
+        for (const { columnNumber, offset } of columnToOffsetMap) {
+          if (columnNumber >= column && columnNumber <= column + 1) {
             entryPoints.push({ script, offsets: [offset] });
           }
         }
       }
 
       // If we don't find any matching entrypoints,
       // then we should see if the breakpoint comes before or after the column offsets.
       if (entryPoints.length === 0) {
         // It's not entirely clear if the scripts that make it here can come
         // from a variety of sources. This function allows filtering by URL
         // so it seems like it may be possible and we are erring on the side
         // of caution by handling it here.
         const closestScripts = findClosestScriptBySource(
           columnToOffsetMaps.map(pair => pair[0]),
-          generatedLine,
-          generatedColumn,
+          line,
+          column,
         );
 
         const columnToOffsetLookup = new Map(columnToOffsetMaps);
         for (const script of closestScripts) {
           const columnToOffsetMap = columnToOffsetLookup.get(script);
 
           if (columnToOffsetMap.length > 0) {
             const firstColumnOffset = columnToOffsetMap[0];
             const lastColumnOffset = columnToOffsetMap[columnToOffsetMap.length - 1];
 
-            if (generatedColumn < firstColumnOffset.columnNumber) {
+            if (column < firstColumnOffset.columnNumber) {
               entryPoints.push({ script, offsets: [firstColumnOffset.offset] });
             }
 
-            if (generatedColumn > lastColumnOffset.columnNumber) {
+            if (column > lastColumnOffset.columnNumber) {
               entryPoints.push({ script, offsets: [lastColumnOffset.offset] });
             }
           }
         }
       }
     }
 
     setBreakpointAtEntryPoints(actor, entryPoints);
--- a/devtools/server/actors/thread.js
+++ b/devtools/server/actors/thread.js
@@ -13,17 +13,16 @@ const { createValueGrip } = require("dev
 const { longStringGrip } = require("devtools/server/actors/object/long-string");
 const { ActorClassWithSpec, Actor } = require("devtools/shared/protocol");
 const DevToolsUtils = require("devtools/shared/DevToolsUtils");
 const { assert, dumpn } = DevToolsUtils;
 const { threadSpec } = require("devtools/shared/specs/script");
 
 loader.lazyRequireGetter(this, "findCssSelector", "devtools/shared/inspector/css-logic", true);
 loader.lazyRequireGetter(this, "EnvironmentActor", "devtools/server/actors/environment", true);
-loader.lazyRequireGetter(this, "SourceActorStore", "devtools/server/actors/utils/source-actor-store", true);
 loader.lazyRequireGetter(this, "BreakpointActorMap", "devtools/server/actors/utils/breakpoint-actor-map", true);
 loader.lazyRequireGetter(this, "PauseScopedObjectActor", "devtools/server/actors/pause-scoped", true);
 loader.lazyRequireGetter(this, "EventLoopStack", "devtools/server/actors/utils/event-loop", true);
 loader.lazyRequireGetter(this, "FrameActor", "devtools/server/actors/frame", true);
 loader.lazyRequireGetter(this, "throttle", "devtools/shared/throttle", true);
 
 /**
  * JSD2 actors.
@@ -61,18 +60,17 @@ const ThreadActor = ActorClassWithSpec(t
     this._scripts = null;
     this._xhrBreakpoints = [];
     this._observingNetwork = false;
 
     this._options = {
       autoBlackBox: false,
     };
 
-    this.breakpointActorMap = new BreakpointActorMap();
-    this.sourceActorStore = new SourceActorStore();
+    this.breakpointActorMap = new BreakpointActorMap(this);
 
     this._debuggerSourcesSeen = null;
 
     // A Set of URLs string to watch for when new sources are found by
     // the debugger instance.
     this._onLoadBreakpointURLs = new Set();
 
     this.global = global;
@@ -147,16 +145,20 @@ const ThreadActor = ActorClassWithSpec(t
     }
     return this._threadLifetimePool;
   },
 
   get sources() {
     return this._parent.sources;
   },
 
+  get breakpoints() {
+    return this._parent.breakpoints;
+  },
+
   get youngestFrame() {
     if (this.state != "paused") {
       return null;
     }
     return this.dbg.getNewestFrame();
   },
 
   /**
@@ -204,21 +206,16 @@ const ThreadActor = ActorClassWithSpec(t
    * `exit`. The actor is truely destroyed in the `exit method`.
    */
   destroy: function() {
     dumpn("in ThreadActor.prototype.destroy");
     if (this._state == "paused") {
       this.onResume();
     }
 
-    // Blow away our source actor ID store because those IDs are only
-    // valid for this connection. This is ok because we never keep
-    // things like breakpoints across connections.
-    this._sourceActorStore = null;
-
     this._xhrBreakpoints = [];
     this._updateNetworkObserver();
 
     this.sources.off("newSource", this.onNewSourceEvent);
     this.sources.off("updatedSource", this.onUpdatedSourceEvent);
     this.clearDebuggees();
     this.conn.removeActorPool(this._threadLifetimePool);
     this._threadLifetimePool = null;
@@ -311,16 +308,34 @@ const ThreadActor = ActorClassWithSpec(t
     this._onLoadBreakpointURLs = new Set(urls);
   },
 
   _findXHRBreakpointIndex(p, m) {
     return this._xhrBreakpoints.findIndex(
       ({ path, method }) => path === p && method === m);
   },
 
+  setBreakpoint(location, options) {
+    const actor = this.breakpointActorMap.getOrCreateBreakpointActor(location);
+    actor.setOptions(options);
+
+    const sourceActor = location.sourceUrl
+      ? this.sources.getSourceActorByURL(location.sourceUrl)
+      : this.sources.getSourceActorById(location.sourceId);
+
+    if (sourceActor) {
+      sourceActor.applyBreakpoint(actor);
+    }
+  },
+
+  removeBreakpoint(location) {
+    const actor = this.breakpointActorMap.getOrCreateBreakpointActor(location);
+    actor.delete();
+  },
+
   removeXHRBreakpoint: function(path, method) {
     const index = this._findXHRBreakpointIndex(path, method);
 
     if (index >= 0) {
       this._xhrBreakpoints.splice(index, 1);
     }
     return this._updateNetworkObserver();
   },
@@ -1781,40 +1796,27 @@ const ThreadActor = ActorClassWithSpec(t
       if (!this.dbg.replaying) {
         return false;
       }
       sourceActor = this.sources.getSourceActor(source);
     } else {
       sourceActor = this.sources.createSourceActor(source);
     }
 
-    const bpActors = [...this.breakpointActorMap.findActors()]
+    if (this._onLoadBreakpointURLs.has(source.url)) {
+      this.setBreakpoint({ sourceUrl: source.url, line: 1 }, {});
+    }
+
+    const bpActors = this.breakpointActorMap.findActors()
     .filter((actor) => {
-      const bpSource = actor.generatedLocation.generatedSourceActor;
-      return bpSource.source ? bpSource.source === source : bpSource.url === source.url;
+      return actor.location.sourceUrl && actor.location.sourceUrl == source.url;
     });
 
-    // Bug 1225160: If addSource is called in response to a new script
-    // notification, and this notification was triggered by loading a JSM from
-    // chrome code, calling unsafeSynchronize could cause a debuggee timer to
-    // fire. If this causes the JSM to be loaded a second time, the browser
-    // will crash, because loading JSMS is not reentrant, and the first load
-    // has not completed yet.
-    //
-    // The root of the problem is that unsafeSynchronize can cause debuggee
-    // code to run. Unfortunately, fixing that is prohibitively difficult. The
-    // best we can do at the moment is disable source maps for the browser
-    // debugger, and carefully avoid the use of unsafeSynchronize in this
-    // function when source maps are disabled.
     for (const actor of bpActors) {
-      actor.generatedLocation.generatedSourceActor._setBreakpoint(actor);
-    }
-
-    if (this._onLoadBreakpointURLs.has(source.url)) {
-      sourceActor.setBreakpoint(1);
+      sourceActor.applyBreakpoint(actor);
     }
 
     this._debuggerSourcesSeen.add(source);
     return true;
   },
 
   /**
    * Get prototypes and properties of multiple objects.
--- a/devtools/server/actors/utils/TabSources.js
+++ b/devtools/server/actors/utils/TabSources.js
@@ -112,24 +112,17 @@ TabSources.prototype = {
     const actor = new SourceActor({
       thread: this._thread,
       source: source,
       originalUrl: originalUrl,
       isInlineSource: isInlineSource,
       contentType: contentType,
     });
 
-    const sourceActorStore = this._thread.sourceActorStore;
-    const id = sourceActorStore.getReusableActorId(source, originalUrl);
-    if (id) {
-      actor.actorID = id;
-    }
-
     this._thread.threadLifetimePool.addActor(actor);
-    sourceActorStore.setReusableActorId(source, originalUrl, actor.actorID);
 
     if (this._autoBlackBox &&
         !this.neverAutoBlackBoxSources.has(actor.url) &&
         this._isMinifiedURL(actor.url)) {
       this.blackBox(actor.url);
       this.neverAutoBlackBoxSources.add(actor.url);
     }
 
@@ -177,18 +170,26 @@ TabSources.prototype = {
           return actor;
         }
       }
 
       if (url in this._htmlDocumentSourceActors) {
         return this._htmlDocumentSourceActors[url];
       }
     }
+    return null;
+  },
 
-    throw new Error("getSourceActorByURL: could not find source for " + url);
+  getSourceActorById(actorId) {
+    for (const [, actor] of this._sourceActors) {
+      if (actor.actorID == actorId) {
+        return actor;
+      }
+    }
+    return null;
   },
 
   /**
    * Returns true if the URL likely points to a minified resource, false
    * otherwise.
    *
    * @param String uri
    *        The url to test.
--- a/devtools/server/actors/utils/breakpoint-actor-map.js
+++ b/devtools/server/actors/utils/breakpoint-actor-map.js
@@ -1,175 +1,65 @@
 /* -*- indent-tabs-mode: nil; js-indent-level: 2; js-indent-level: 2 -*- */
 /* vim: set ft=javascript ts=2 et sw=2 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
-const { GeneratedLocation } = require("devtools/server/actors/common");
+const { BreakpointActor } = require("devtools/server/actors/breakpoint");
 
 /**
  * A BreakpointActorMap is a map from locations to instances of BreakpointActor.
  */
-function BreakpointActorMap() {
-  this._size = 0;
+function BreakpointActorMap(threadActor) {
+  this._threadActor = threadActor;
   this._actors = {};
 }
 
 BreakpointActorMap.prototype = {
-  /**
-   * Return the number of BreakpointActors in this BreakpointActorMap.
-   *
-   * @returns Number
-   *          The number of BreakpointActor in this BreakpointActorMap.
-   */
-  get size() {
-    return this._size;
+  // Get the key in the _actors table for a given breakpoint location.
+  // See also duplicate code in commands.js :(
+  _locationKey(location) {
+    const { sourceUrl, sourceId, line, column } = location;
+    return `${sourceUrl}:${sourceId}:${line}:${column}`;
   },
 
   /**
-   * Generate all BreakpointActors that match the given location in
-   * this BreakpointActorMap.
-   *
-   * @param GeneratedLocation location
-   *        The location for which matching BreakpointActors should be generated.
+   * Return all BreakpointActors in this BreakpointActorMap.
    */
-  findActors: function* (location = new GeneratedLocation()) {
-    // Fast shortcut for when we know we won't find any actors. Surprisingly
-    // enough, this speeds up refreshing when there are no breakpoints set by
-    // about 2x!
-    if (this.size === 0) {
-      return;
-    }
-
-    function* findKeys(obj, key) {
-      if (key !== undefined) {
-        if (key in obj) {
-          yield key;
-        }
-      } else {
-        for (key of Object.keys(obj)) {
-          yield key;
-        }
-      }
-    }
-
-    const query = {
-      sourceActorID: location.generatedSourceActor
-                     ? location.generatedSourceActor.actorID
-                     : undefined,
-      line: location.generatedLine,
-    };
-
-    // If location contains a line, assume we are searching for a whole line
-    // breakpoint, and set begin/endColumn accordingly. Otherwise, we are
-    // searching for all breakpoints, so begin/endColumn should be left unset.
-    if (location.generatedLine) {
-      query.beginColumn = location.generatedColumn ? location.generatedColumn : 0;
-      query.endColumn = location.generatedColumn
-        ? location.generatedColumn + 1
-        : Infinity;
-    } else {
-      query.beginColumn = location.generatedColumn ? query.generatedColumn : undefined;
-      query.endColumn = location.generatedColumn ? query.generatedColumn + 1 : undefined;
-    }
-
-    for (const sourceActorID of findKeys(this._actors, query.sourceActorID)) {
-      const actor = this._actors[sourceActorID];
-      for (const line of findKeys(actor, query.line)) {
-        for (const beginColumn of findKeys(actor[line], query.beginColumn)) {
-          for (const endColumn of findKeys(actor[line][beginColumn],
-               query.endColumn)) {
-            yield actor[line][beginColumn][endColumn];
-          }
-        }
-      }
-    }
+  findActors() {
+    return Object.values(this._actors);
   },
 
   /**
    * Return the BreakpointActor at the given location in this
    * BreakpointActorMap.
    *
-   * @param GeneratedLocation location
+   * @param BreakpointLocation location
    *        The location for which the BreakpointActor should be returned.
    *
    * @returns BreakpointActor actor
    *          The BreakpointActor at the given location.
    */
-  getActor: function(generatedLocation) {
-    for (const actor of this.findActors(generatedLocation)) {
-      return actor;
+  getOrCreateBreakpointActor(location) {
+    const key = this._locationKey(location);
+    if (!this._actors[key]) {
+      this._actors[key] = new BreakpointActor(this._threadActor, location);
     }
-
-    return null;
-  },
-
-  /**
-   * Set the given BreakpointActor to the given location in this
-   * BreakpointActorMap.
-   *
-   * @param GeneratedLocation location
-   *        The location to which the given BreakpointActor should be set.
-   *
-   * @param BreakpointActor actor
-   *        The BreakpointActor to be set to the given location.
-   */
-  setActor: function(location, actor) {
-    const { generatedSourceActor, generatedLine, generatedColumn } = location;
-
-    const sourceActorID = generatedSourceActor.actorID;
-    const line = generatedLine;
-    const beginColumn = generatedColumn ? generatedColumn : 0;
-    const endColumn = generatedColumn ? generatedColumn + 1 : Infinity;
-
-    if (!this._actors[sourceActorID]) {
-      this._actors[sourceActorID] = [];
-    }
-    if (!this._actors[sourceActorID][line]) {
-      this._actors[sourceActorID][line] = [];
-    }
-    if (!this._actors[sourceActorID][line][beginColumn]) {
-      this._actors[sourceActorID][line][beginColumn] = [];
-    }
-    if (!this._actors[sourceActorID][line][beginColumn][endColumn]) {
-      ++this._size;
-    }
-    this._actors[sourceActorID][line][beginColumn][endColumn] = actor;
+    return this._actors[key];
   },
 
   /**
    * Delete the BreakpointActor from the given location in this
    * BreakpointActorMap.
    *
-   * @param GeneratedLocation location
+   * @param BreakpointLocation location
    *        The location from which the BreakpointActor should be deleted.
    */
-  deleteActor: function(location) {
-    const { generatedSourceActor, generatedLine, generatedColumn } = location;
-
-    const sourceActorID = generatedSourceActor.actorID;
-    const line = generatedLine;
-    const beginColumn = generatedColumn ? generatedColumn : 0;
-    const endColumn = generatedColumn ? generatedColumn + 1 : Infinity;
-
-    if (this._actors[sourceActorID]) {
-      if (this._actors[sourceActorID][line]) {
-        if (this._actors[sourceActorID][line][beginColumn]) {
-          if (this._actors[sourceActorID][line][beginColumn][endColumn]) {
-            --this._size;
-          }
-          delete this._actors[sourceActorID][line][beginColumn][endColumn];
-          if (Object.keys(this._actors[sourceActorID][line][beginColumn]).length === 0) {
-            delete this._actors[sourceActorID][line][beginColumn];
-          }
-        }
-        if (Object.keys(this._actors[sourceActorID][line]).length === 0) {
-          delete this._actors[sourceActorID][line];
-        }
-      }
-    }
+  deleteActor(location) {
+    const key = this._locationKey(location);
+    delete this._actors[key];
   },
 };
 
 exports.BreakpointActorMap = BreakpointActorMap;
--- a/devtools/server/actors/utils/moz.build
+++ b/devtools/server/actors/utils/moz.build
@@ -14,14 +14,13 @@ DevToolsModules(
     'call-watcher.js',
     'closest-scripts.js',
     'css-grid-utils.js',
     'dbg-source.js',
     'event-loop.js',
     'function-call.js',
     'make-debugger.js',
     'shapes-utils.js',
-    'source-actor-store.js',
     'stack.js',
     'TabSources.js',
     'track-change-emitter.js',
     'walker-search.js',
 )
deleted file mode 100644
--- a/devtools/server/actors/utils/source-actor-store.js
+++ /dev/null
@@ -1,57 +0,0 @@
-/* -*- indent-tabs-mode: nil; js-indent-level: 2; js-indent-level: 2 -*- */
-/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-loader.lazyRequireGetter(this, "getSourceURL", "devtools/server/actors/source", true);
-
-/**
- * Keeps track of persistent sources across reloads and ties different
- * source instances to the same actor id so that things like
- * breakpoints survive reloads. ThreadSources uses this to force the
- * same actorID on a SourceActor.
- */
-function SourceActorStore() {
-  // source identifier --> actor id
-  this._sourceActorIds = Object.create(null);
-}
-
-SourceActorStore.prototype = {
-  /**
-   * Lookup an existing actor id that represents this source, if available.
-   */
-  getReusableActorId: function(source, originalUrl) {
-    const url = this.getUniqueKey(source, originalUrl);
-    if (url && url in this._sourceActorIds) {
-      return this._sourceActorIds[url];
-    }
-    return null;
-  },
-
-  /**
-   * Update a source with an actorID.
-   */
-  setReusableActorId: function(source, originalUrl, actorID) {
-    const url = this.getUniqueKey(source, originalUrl);
-    if (url) {
-      this._sourceActorIds[url] = actorID;
-    }
-  },
-
-  /**
-   * Make a unique URL from a source that identifies it across reloads.
-   */
-  getUniqueKey: function(source, originalUrl) {
-    if (originalUrl) {
-      // Original source from a sourcemap.
-      return originalUrl;
-    }
-
-    return getSourceURL(source);
-  },
-};
-
-exports.SourceActorStore = SourceActorStore;
--- a/devtools/server/tests/unit/head_dbg.js
+++ b/devtools/server/tests/unit/head_dbg.js
@@ -244,19 +244,19 @@ function waitForProperty(dbg, property) 
     Object.defineProperty(dbg, property, {
       set(newValue) {
         resolve(newValue);
       },
     });
   });
 }
 
-function setBreakpoint(sourceClient, location) {
+function setBreakpoint(threadClient, location) {
   dump("Setting breakpoint.\n");
-  return sourceClient.setBreakpoint(location);
+  return threadClient.setBreakpoint(location, {});
 }
 
 function getPrototypeAndProperties(objClient) {
   dump("getting prototype and properties.\n");
 
   return new Promise(resolve => {
     objClient.getPrototypeAndProperties(response => resolve(response));
   });
--- a/devtools/server/tests/unit/test_blackboxing-01.js
+++ b/devtools/server/tests/unit/test_blackboxing-01.js
@@ -31,17 +31,17 @@ const SOURCE_URL = "http://example.com/s
 const testBlackBox = async function() {
   const packet = await executeOnNextTickAndWaitForPause(evalCode, gClient);
 
   const bpSource = await getSourceById(
     gThreadClient,
     packet.frame.where.actor
   );
 
-  await setBreakpoint(bpSource, { line: 2 });
+  await setBreakpoint(gThreadClient, { sourceUrl: bpSource.url, line: 2 });
   await resume(gThreadClient);
 
   let sourceForm = await getSourceForm(gThreadClient, BLACK_BOXED_URL);
 
   Assert.ok(!sourceForm.isBlackBoxed,
             "By default the source is not black boxed.");
 
   // Test that we can step into `doStuff` when we are not black boxed.
--- a/devtools/server/tests/unit/test_blackboxing-02.js
+++ b/devtools/server/tests/unit/test_blackboxing-02.js
@@ -38,21 +38,18 @@ function test_black_box() {
       gThreadClient.addOneTimeListener("paused", function(event, packet) {
         const obj = gThreadClient.pauseGrip(packet.why.frameFinished.return);
         obj.getDefinitionSite(runWithSource);
       });
     });
 
     function runWithSource(packet) {
       const source = gThreadClient.source(packet.source);
-      source.setBreakpoint({
-        line: 2,
-      }).then(function() {
-        gThreadClient.resume(test_black_box_breakpoint);
-      });
+      gThreadClient.setBreakpoint({ sourceUrl: source.url, line: 2 }, {});
+      gThreadClient.resume(test_black_box_breakpoint);
     }
   });
 
   /* eslint-disable no-multi-spaces, no-undef */
   Cu.evalInSandbox(
     "" + function doStuff(k) { // line 1
       const arg = 15;            // line 2 - Break here
       k(arg);                  // line 3
--- a/devtools/server/tests/unit/test_blackboxing-03.js
+++ b/devtools/server/tests/unit/test_blackboxing-03.js
@@ -6,17 +6,16 @@
 
 /**
  * Test that we don't stop at debugger statements inside black boxed sources.
  */
 
 var gDebuggee;
 var gClient;
 var gThreadClient;
-var gBpClient;
 
 function run_test() {
   initTestDebuggerServer();
   gDebuggee = addTestGlobal("test-black-box");
   gClient = new DebuggerClient(DebuggerServer.connectPipe());
   gClient.connect().then(function() {
     attachTestTabAndResume(gClient, "test-black-box",
                            function(response, targetFront, threadClient) {
@@ -28,18 +27,17 @@ function run_test() {
 }
 
 const BLACK_BOXED_URL = "http://example.com/blackboxme.js";
 const SOURCE_URL = "http://example.com/source.js";
 
 function test_black_box() {
   gClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(gThreadClient, packet.frame.where.actor);
-    const [, bpClient] = await source.setBreakpoint({ line: 4 });
-    gBpClient = bpClient;
+    gThreadClient.setBreakpoint({ sourceUrl: source.url, line: 4 }, {});
     await gThreadClient.resume();
     test_black_box_dbg_statement();
   });
 
   /* eslint-disable no-multi-spaces, no-undef */
   Cu.evalInSandbox(
     "" + function doStuff(k) { // line 1
       debugger;                // line 2 - Break here
@@ -74,17 +72,19 @@ function test_black_box_dbg_statement() 
     const sourceClient = await getSource(gThreadClient, BLACK_BOXED_URL);
 
     await blackBox(sourceClient);
 
     gThreadClient.addOneTimeListener("paused", async function(event, packet) {
       Assert.equal(packet.why.type, "breakpoint",
                    "We should pass over the debugger statement.");
 
-      await gBpClient.remove();
+      const source = await getSourceById(gThreadClient, packet.frame.where.actor);
+      gThreadClient.removeBreakpoint({ sourceUrl: source.url, line: 4 }, {});
+
       await gThreadClient.resume();
       await test_unblack_box_dbg_statement(sourceClient);
     });
     gDebuggee.runTest();
   });
 }
 
 async function test_unblack_box_dbg_statement(sourceClient) {
--- a/devtools/server/tests/unit/test_blackboxing-04.js
+++ b/devtools/server/tests/unit/test_blackboxing-04.js
@@ -35,19 +35,18 @@ function test_black_box() {
       gThreadClient.addOneTimeListener("paused", function(event, packet) {
         const obj = gThreadClient.pauseGrip(packet.why.frameFinished.return);
         obj.getDefinitionSite(runWithSource);
       });
     });
 
     function runWithSource(packet) {
       const source = gThreadClient.source(packet.source);
-      source.setBreakpoint({
-        line: 2,
-      }).then(test_black_box_paused);
+      gThreadClient.setBreakpoint({ sourceUrl: source.url, line: 2 }, {});
+      test_black_box_paused();
     }
   });
 
   /* eslint-disable no-multi-spaces, no-undef */
   Cu.evalInSandbox(
     "" + function doStuff(k) { // line 1
       debugger;                // line 2
       k(100);                  // line 3
--- a/devtools/server/tests/unit/test_blackboxing-08.js
+++ b/devtools/server/tests/unit/test_blackboxing-08.js
@@ -26,18 +26,18 @@ function run_test() {
     const dbg = await setupTestFromUrl("stepping.js");
     const { threadClient } = dbg;
 
     await invokeAndPause(dbg, `chaining()`);
 
     const { sources } = await getSources(threadClient);
     const sourceClient = threadClient.source(sources[0]);
 
-    await setBreakpoint(sourceClient, { line: 7 });
-    await setBreakpoint(sourceClient, { line: 11 });
+    await setBreakpoint(threadClient, { sourceUrl: sourceClient.url, line: 7 });
+    await setBreakpoint(threadClient, { sourceUrl: sourceClient.url, line: 11 });
 
     // 1. lets blackbox function a, and assert that we pause in b
     const range = {start: { line: 6, column: 0 }, end: { line: 8, colum: 1 }};
     blackBox(sourceClient, range);
     resume(threadClient);
     const paused = await waitForPause(threadClient);
     equal(paused.frame.where.line, 11, "paused inside of b");
     await resume(threadClient);
--- a/devtools/server/tests/unit/test_breakpoint-01.js
+++ b/devtools/server/tests/unit/test_breakpoint-01.js
@@ -12,35 +12,33 @@ add_task(threadClientTest(async ({ threa
   (async () => {
     info("Wait for the debugger statement to be hit");
     let packet = await waitForPause(threadClient);
     const source = await getSourceById(
       threadClient,
       packet.frame.where.actor
     );
 
-    const location = { line: debuggee.line0 + 3 };
+    const location = { sourceUrl: source.url, line: debuggee.line0 + 3 };
 
-    const [, bpClient] = await source.setBreakpoint(location);
+    threadClient.setBreakpoint(location, {});
 
     await threadClient.resume();
     packet = await waitForPause(threadClient);
 
     info("Paused at the breakpoint");
     Assert.equal(packet.type, "paused");
     Assert.equal(packet.frame.where.actor, source.actor);
     Assert.equal(packet.frame.where.line, location.line);
     Assert.equal(packet.why.type, "breakpoint");
-    Assert.equal(packet.why.actors[0], bpClient.actor);
 
     info("Check that the breakpoint worked.");
     Assert.equal(debuggee.a, 1);
     Assert.equal(debuggee.b, undefined);
 
-    await bpClient.remove();
     await threadClient.resume();
   })();
 
   /* eslint-disable */
   Cu.evalInSandbox(
     "var line0 = Error().lineNumber;\n" +
     "debugger;\n" +   // line0 + 1
     "var a = 1;\n" +  // line0 + 2
--- a/devtools/server/tests/unit/test_breakpoint-02.js
+++ b/devtools/server/tests/unit/test_breakpoint-02.js
@@ -6,39 +6,32 @@
 
 /**
  * Check that setting breakpoints when the debuggee is running works.
  */
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise((resolve) => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
-      const location = { line: debuggee.line0 + 3 };
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 3 };
 
       threadClient.resume();
 
       // Setting the breakpoint later should interrupt the debuggee.
       threadClient.addOneTimeListener("paused", function(event, packet) {
         Assert.equal(packet.type, "paused");
         Assert.equal(packet.why.type, "interrupted");
       });
 
-      source.setBreakpoint(location).then(function() {
-        executeSoon(resolve);
-      }, function(response) {
-        // Eval scripts don't stick around long enough for the breakpoint to be set,
-        // so just make sure we got the expected response from the actor.
-        Assert.notEqual(response.error, "noScript");
-
-        executeSoon(resolve);
-      });
+      threadClient.setBreakpoint(location, {});
+      executeSoon(resolve);
     });
 
     /* eslint-disable */
     Cu.evalInSandbox(
       "var line0 = Error().lineNumber;\n" +
       "debugger;\n" +
       "var a = 1;\n" +  // line0 + 2
       "var b = 2;\n",  // line0 + 3
--- a/devtools/server/tests/unit/test_breakpoint-04.js
+++ b/devtools/server/tests/unit/test_breakpoint-04.js
@@ -10,42 +10,37 @@
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 3 };
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 3 };
 
-      source.setBreakpoint(location).then(function([response, bpClient]) {
-        // actualLocation is not returned when breakpoints don't skip forward.
-        Assert.equal(response.actualLocation, undefined);
+      threadClient.setBreakpoint(location, {});
 
-        threadClient.addOneTimeListener("paused", function(event, packet) {
-          // Check the return value.
-          Assert.equal(packet.type, "paused");
-          Assert.equal(packet.frame.where.actor, source.actor);
-          Assert.equal(packet.frame.where.line, location.line);
-          Assert.equal(packet.why.type, "breakpoint");
-          Assert.equal(packet.why.actors[0], bpClient.actor);
-          // Check that the breakpoint worked.
-          Assert.equal(debuggee.a, 1);
-          Assert.equal(debuggee.b, undefined);
+      threadClient.addOneTimeListener("paused", function(event, packet) {
+        // Check the return value.
+        Assert.equal(packet.type, "paused");
+        Assert.equal(packet.frame.where.actor, source.actor);
+        Assert.equal(packet.frame.where.line, location.line);
+        Assert.equal(packet.why.type, "breakpoint");
+        // Check that the breakpoint worked.
+        Assert.equal(debuggee.a, 1);
+        Assert.equal(debuggee.b, undefined);
 
-          // Remove the breakpoint.
-          bpClient.remove(function(response) {
-            threadClient.resume(resolve);
-          });
-        });
+        // Remove the breakpoint.
+        threadClient.removeBreakpoint(location);
+        threadClient.resume(resolve);
+      });
 
-        // Continue until the breakpoint is hit.
-        threadClient.resume();
-      });
+      // Continue until the breakpoint is hit.
+      threadClient.resume();
     });
 
     /* eslint-disable */
     Cu.evalInSandbox(
       "var line0 = Error().lineNumber;\n" +
       "function foo() {\n" + // line0 + 1
       "  this.a = 1;\n" +    // line0 + 2
       "  this.b = 2;\n" +    // line0 + 3
--- a/devtools/server/tests/unit/test_breakpoint-09.js
+++ b/devtools/server/tests/unit/test_breakpoint-09.js
@@ -11,45 +11,43 @@
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     let done = false;
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 2 };
-
-      source.setBreakpoint(location).then(function([response, bpClient]) {
-        threadClient.addOneTimeListener("paused", function(event, packet) {
-          // Check the return value.
-          Assert.equal(packet.type, "paused");
-          Assert.equal(packet.frame.where.actor, source.actor);
-          Assert.equal(packet.frame.where.line, location.line);
-          Assert.equal(packet.why.type, "breakpoint");
-          Assert.equal(packet.why.actors[0], bpClient.actor);
-          // Check that the breakpoint worked.
-          Assert.equal(debuggee.a, undefined);
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 2 };
 
-          // Remove the breakpoint.
-          bpClient.remove(function(response) {
-            done = true;
-            threadClient.addOneTimeListener("paused",
-                                             function(event, packet) {
+      threadClient.setBreakpoint(location, {});
+      threadClient.addOneTimeListener("paused", function(event, packet) {
+        // Check the return value.
+        Assert.equal(packet.type, "paused");
+        Assert.equal(packet.frame.where.actor, source.actor);
+        Assert.equal(packet.frame.where.line, location.line);
+        Assert.equal(packet.why.type, "breakpoint");
+        // Check that the breakpoint worked.
+        Assert.equal(debuggee.a, undefined);
+
+        // Remove the breakpoint.
+        threadClient.removeBreakpoint(location);
+        done = true;
+        threadClient.addOneTimeListener("paused",
+                                        function(event, packet) {
               // The breakpoint should not be hit again.
-                                               threadClient.resume(function() {
-                                                 Assert.ok(false);
-                                               });
-                                             });
-            threadClient.resume();
-          });
-        });
-        // Continue until the breakpoint is hit.
+                                          threadClient.resume(function() {
+                                            Assert.ok(false);
+                                          });
+                                        });
         threadClient.resume();
       });
+
+      // Continue until the breakpoint is hit.
+      threadClient.resume();
     });
 
     /* eslint-disable */
     Cu.evalInSandbox("var line0 = Error().lineNumber;\n" +
                      "function foo(stop) {\n" + // line0 + 1
                      "  this.a = 1;\n" +        // line0 + 2
                      "  if (stop) return;\n" +  // line0 + 3
                      "  delete this.a;\n" +     // line0 + 4
--- a/devtools/server/tests/unit/test_breakpoint-10.js
+++ b/devtools/server/tests/unit/test_breakpoint-10.js
@@ -11,50 +11,46 @@
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 3 };
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 3 };
+
+      threadClient.setBreakpoint(location, {});
 
-      source.setBreakpoint(location).then(function([response, bpClient]) {
-        // actualLocation is not returned when breakpoints don't skip forward.
-        Assert.equal(response.actualLocation, undefined);
+      threadClient.addOneTimeListener("paused", function(event, packet) {
+        // Check the return value.
+        Assert.equal(packet.type, "paused");
+        Assert.equal(packet.why.type, "breakpoint");
+        // Check that the breakpoint worked.
+        Assert.equal(debuggee.i, 0);
 
         threadClient.addOneTimeListener("paused", function(event, packet) {
           // Check the return value.
           Assert.equal(packet.type, "paused");
           Assert.equal(packet.why.type, "breakpoint");
-          Assert.equal(packet.why.actors[0], bpClient.actor);
           // Check that the breakpoint worked.
-          Assert.equal(debuggee.i, 0);
+          Assert.equal(debuggee.i, 1);
 
-          threadClient.addOneTimeListener("paused", function(event, packet) {
-            // Check the return value.
-            Assert.equal(packet.type, "paused");
-            Assert.equal(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.actors[0], bpClient.actor);
-            // Check that the breakpoint worked.
-            Assert.equal(debuggee.i, 1);
+          // Remove the breakpoint.
+          threadClient.removeBreakpoint(location);
 
-            // Remove the breakpoint.
-            bpClient.remove(function(response) {
-              threadClient.resume(resolve);
-            });
-          });
+          threadClient.resume(resolve);
+        });
 
-          // Continue until the breakpoint is hit again.
-          threadClient.resume();
-        });
-        // Continue until the breakpoint is hit.
+        // Continue until the breakpoint is hit again.
         threadClient.resume();
       });
+
+      // Continue until the breakpoint is hit.
+      threadClient.resume();
     });
 
     /* eslint-disable */
     Cu.evalInSandbox("var line0 = Error().lineNumber;\n" +
                      "debugger;\n" +                      // line0 + 1
                      "var a, i = 0;\n" +                  // line0 + 2
                      "for (i = 1; i <= 2; i++) {\n" +     // line0 + 3
                      "  a = i;\n" +                       // line0 + 4
--- a/devtools/server/tests/unit/test_breakpoint-11.js
+++ b/devtools/server/tests/unit/test_breakpoint-11.js
@@ -11,51 +11,47 @@
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 2 };
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 2 };
+
+      threadClient.setBreakpoint(location, {});
 
-      source.setBreakpoint(location).then(function([response, bpClient]) {
-        // actualLocation is not returned when breakpoints don't skip forward.
-        Assert.equal(response.actualLocation, undefined);
+      threadClient.addOneTimeListener("paused", function(event, packet) {
+        // Check the return value.
+        Assert.equal(packet.type, "paused");
+        Assert.equal(packet.why.type, "breakpoint");
+        // Check that the breakpoint worked.
+        Assert.equal(debuggee.a, undefined);
 
         threadClient.addOneTimeListener("paused", function(event, packet) {
           // Check the return value.
           Assert.equal(packet.type, "paused");
           Assert.equal(packet.why.type, "breakpoint");
-          Assert.equal(packet.why.actors[0], bpClient.actor);
           // Check that the breakpoint worked.
-          Assert.equal(debuggee.a, undefined);
+          Assert.equal(debuggee.a.b, 1);
+          Assert.equal(debuggee.res, undefined);
 
-          threadClient.addOneTimeListener("paused", function(event, packet) {
-            // Check the return value.
-            Assert.equal(packet.type, "paused");
-            Assert.equal(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.actors[0], bpClient.actor);
-            // Check that the breakpoint worked.
-            Assert.equal(debuggee.a.b, 1);
-            Assert.equal(debuggee.res, undefined);
+          // Remove the breakpoint.
+          threadClient.removeBreakpoint(location);
 
-            // Remove the breakpoint.
-            bpClient.remove(function(response) {
-              threadClient.resume(resolve);
-            });
-          });
+          threadClient.resume(resolve);
+        });
 
-          // Continue until the breakpoint is hit again.
-          threadClient.resume();
-        });
-        // Continue until the breakpoint is hit.
+        // Continue until the breakpoint is hit again.
         threadClient.resume();
       });
+
+      // Continue until the breakpoint is hit.
+      threadClient.resume();
     });
 
     /* eslint-disable */
     Cu.evalInSandbox("var line0 = Error().lineNumber;\n" +
                      "debugger;\n" +                      // line0 + 1
                      "var a = { b: 1, f: function() { return 2; } };\n" + // line0+2
                      "var res = a.f();\n",               // line0 + 3
                      debuggee);
--- a/devtools/server/tests/unit/test_breakpoint-13.js
+++ b/devtools/server/tests/unit/test_breakpoint-13.js
@@ -11,75 +11,77 @@
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 2 };
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 2 };
+
+      threadClient.setBreakpoint(location, {});
 
-      source.setBreakpoint(location).then(async function([response, bpClient]) {
-        const testCallbacks = [
-          function(packet) {
-            // Check that the stepping worked.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 5);
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // Entered the foo function call frame.
-            Assert.equal(packet.frame.where.line, location.line);
-            Assert.notEqual(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // At the end of the foo function call frame.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
-            Assert.notEqual(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // Check that the breakpoint wasn't the reason for this pause, but
-            // that the frame is about to be popped while stepping.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
-            Assert.notEqual(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.type, "resumeLimit");
-            Assert.equal(packet.why.frameFinished.return.type, "undefined");
-          },
-          function(packet) {
-            // Check that the debugger statement wasn't the reason for this pause.
-            Assert.equal(debuggee.a, 1);
-            Assert.equal(debuggee.b, undefined);
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 6);
-            Assert.notEqual(packet.why.type, "debuggerStatement");
-            Assert.equal(packet.why.type, "resumeLimit");
-            Assert.equal(packet.poppedFrames.length, 1);
-          },
-          function(packet) {
-            // Check that the debugger statement wasn't the reason for this pause.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 7);
-            Assert.notEqual(packet.why.type, "debuggerStatement");
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-        ];
+      const testCallbacks = [
+        function(packet) {
+          // Check that the stepping worked.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 5);
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // Entered the foo function call frame.
+          Assert.equal(packet.frame.where.line, location.line);
+          Assert.notEqual(packet.why.type, "breakpoint");
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // At the end of the foo function call frame.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
+          Assert.notEqual(packet.why.type, "breakpoint");
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // Check that the breakpoint wasn't the reason for this pause, but
+          // that the frame is about to be popped while stepping.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
+          Assert.notEqual(packet.why.type, "breakpoint");
+          Assert.equal(packet.why.type, "resumeLimit");
+          Assert.equal(packet.why.frameFinished.return.type, "undefined");
+        },
+        function(packet) {
+          // Check that the debugger statement wasn't the reason for this pause.
+          Assert.equal(debuggee.a, 1);
+          Assert.equal(debuggee.b, undefined);
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 6);
+          Assert.notEqual(packet.why.type, "debuggerStatement");
+          Assert.equal(packet.why.type, "resumeLimit");
+          Assert.equal(packet.poppedFrames.length, 1);
+        },
+        function(packet) {
+          // Check that the debugger statement wasn't the reason for this pause.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 7);
+          Assert.notEqual(packet.why.type, "debuggerStatement");
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+      ];
 
-        for (const callback of testCallbacks) {
-          const waiter = waitForPause(threadClient);
-          threadClient.stepIn();
-          const packet = await waiter;
-          callback(packet);
-        }
-
-        // Remove the breakpoint and finish.
+      for (const callback of testCallbacks) {
         const waiter = waitForPause(threadClient);
         threadClient.stepIn();
-        await waiter;
-        bpClient.remove(() => threadClient.resume(resolve));
-      });
+        const packet = await waiter;
+        callback(packet);
+      }
+
+      // Remove the breakpoint and finish.
+      const waiter = waitForPause(threadClient);
+      threadClient.stepIn();
+      await waiter;
+      threadClient.removeBreakpoint(location);
+
+      threadClient.resume(resolve);
     });
 
     /* eslint-disable */
     Cu.evalInSandbox("var line0 = Error().lineNumber;\n" +
                      "function foo() {\n" + // line0 + 1
                      "  this.a = 1;\n" +    // line0 + 2 <-- Breakpoint is set here.
                      "}\n" +                // line0 + 3
                      "debugger;\n" +        // line0 + 4
--- a/devtools/server/tests/unit/test_breakpoint-14.js
+++ b/devtools/server/tests/unit/test_breakpoint-14.js
@@ -11,73 +11,73 @@
 
 add_task(threadClientTest(({ threadClient, debuggee }) => {
   return new Promise(resolve => {
     threadClient.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
-      const location = { line: debuggee.line0 + 2 };
+      const location = { sourceUrl: source.url, line: debuggee.line0 + 2 };
 
-      source.setBreakpoint(location).then(async function([response, bpClient]) {
-        const testCallbacks = [
-          function(packet) {
-            // Check that the stepping worked.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 5);
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // Reached the breakpoint.
-            Assert.equal(packet.frame.where.line, location.line);
-            Assert.equal(packet.why.type, "breakpoint");
-            Assert.notEqual(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // Stepped to the closing brace of the function.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-          function(packet) {
-            // The frame is about to be popped while stepping.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
-            Assert.notEqual(packet.why.type, "breakpoint");
-            Assert.equal(packet.why.type, "resumeLimit");
-            Assert.equal(packet.why.frameFinished.return.type, "undefined");
-          },
-          function(packet) {
-            // Check that the debugger statement wasn't the reason for this pause.
-            Assert.equal(debuggee.a, 1);
-            Assert.equal(debuggee.b, undefined);
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 6);
-            Assert.notEqual(packet.why.type, "debuggerStatement");
-            Assert.equal(packet.why.type, "resumeLimit");
-            Assert.equal(packet.poppedFrames.length, 1);
-          },
-          function(packet) {
-            // Check that the debugger statement wasn't the reason for this pause.
-            Assert.equal(packet.frame.where.line, debuggee.line0 + 7);
-            Assert.notEqual(packet.why.type, "debuggerStatement");
-            Assert.equal(packet.why.type, "resumeLimit");
-          },
-        ];
+      threadClient.setBreakpoint(location, {});
+      const testCallbacks = [
+        function(packet) {
+          // Check that the stepping worked.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 5);
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // Reached the breakpoint.
+          Assert.equal(packet.frame.where.line, location.line);
+          Assert.equal(packet.why.type, "breakpoint");
+          Assert.notEqual(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // Stepped to the closing brace of the function.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+        function(packet) {
+          // The frame is about to be popped while stepping.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 3);
+          Assert.notEqual(packet.why.type, "breakpoint");
+          Assert.equal(packet.why.type, "resumeLimit");
+          Assert.equal(packet.why.frameFinished.return.type, "undefined");
+        },
+        function(packet) {
+          // Check that the debugger statement wasn't the reason for this pause.
+          Assert.equal(debuggee.a, 1);
+          Assert.equal(debuggee.b, undefined);
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 6);
+          Assert.notEqual(packet.why.type, "debuggerStatement");
+          Assert.equal(packet.why.type, "resumeLimit");
+          Assert.equal(packet.poppedFrames.length, 1);
+        },
+        function(packet) {
+          // Check that the debugger statement wasn't the reason for this pause.
+          Assert.equal(packet.frame.where.line, debuggee.line0 + 7);
+          Assert.notEqual(packet.why.type, "debuggerStatement");
+          Assert.equal(packet.why.type, "resumeLimit");
+        },
+      ];
 
-        for (const callback of testCallbacks) {
-          const waiter = waitForPause(threadClient);
-          threadClient.stepOver();
-          const packet = await waiter;
-          callback(packet);
-        }
-
-        // Remove the breakpoint and finish.
+      for (const callback of testCallbacks) {
         const waiter = waitForPause(threadClient);
         threadClient.stepOver();
-        await waiter;
-        bpClient.remove(() => threadClient.resume(resolve));
-      });
+        const packet = await waiter;
+        callback(packet);
+      }
+
+      // Remove the breakpoint and finish.
+      const waiter = waitForPause(threadClient);
+      threadClient.stepOver();
+      await waiter;
+      threadClient.removeBreakpoint(location);
+      threadClient.resume(resolve);
     });
 
     /* eslint-disable */
     Cu.evalInSandbox("var line0 = Error().lineNumber;\n" +
                      "function foo() {\n" + // line0 + 1
                      "  this.a = 1;\n" +    // line0 + 2 <-- Breakpoint is set here.
                      "}\n" +                // line0 + 3
                      "debugger;\n" +        // line0 + 4
--- a/devtools/server/tests/unit/test_breakpoint-16.js
+++ b/devtools/server/tests/unit/test_breakpoint-16.js
@@ -12,47 +12,46 @@ add_task(threadClientTest(({ threadClien
   return new Promise(resolve => {
     // Debugger statement
     client.addOneTimeListener("paused", async function(event, packet) {
       const source = await getSourceById(
         threadClient,
         packet.frame.where.actor
       );
       const location = {
+        sourceUrl: source.url,
         line: debuggee.line0 + 1,
         column: 55,
       };
       let timesBreakpointHit = 0;
 
-      source.setBreakpoint(location).then(function([response, bpClient]) {
-        threadClient.addListener("paused", function onPaused(event, packet) {
-          Assert.equal(packet.type, "paused");
-          Assert.equal(packet.why.type, "breakpoint");
-          Assert.equal(packet.why.actors[0], bpClient.actor);
-          Assert.equal(packet.frame.where.actor, source.actor);
-          Assert.equal(packet.frame.where.line, location.line);
-          Assert.equal(packet.frame.where.column, location.column);
+      threadClient.setBreakpoint(location, {});
 
-          Assert.equal(debuggee.acc, timesBreakpointHit);
-          Assert.equal(packet.frame.environment.bindings.variables.i.value,
-                       timesBreakpointHit);
+      threadClient.addListener("paused", function onPaused(event, packet) {
+        Assert.equal(packet.type, "paused");
+        Assert.equal(packet.why.type, "breakpoint");
+        Assert.equal(packet.frame.where.actor, source.actor);
+        Assert.equal(packet.frame.where.line, location.line);
+        Assert.equal(packet.frame.where.column, location.column);
 
-          if (++timesBreakpointHit === 3) {
-            threadClient.removeListener("paused", onPaused);
-            bpClient.remove(function(response) {
-              threadClient.resume(resolve);
-            });
-          } else {
-            threadClient.resume();
-          }
-        });
+        Assert.equal(debuggee.acc, timesBreakpointHit);
+        Assert.equal(packet.frame.environment.bindings.variables.i.value,
+                     timesBreakpointHit);
 
-        // Continue until the breakpoint is hit.
-        threadClient.resume();
+        if (++timesBreakpointHit === 3) {
+          threadClient.removeListener("paused", onPaused);
+          threadClient.removeBreakpoint(location);
+          threadClient.resume(resolve);
+        } else {
+          threadClient.resume();
+        }
       });
+
+      // Continue until the breakpoint is hit.
+      threadClient.resume();
     });
 
     /* eslint-disable */
     Cu.evalInSandbox(
       "var line0 = Error().lineNumber;\n" +
       "(function () { debugger; this.acc = 0; for (var i = 0; i < 3; i++) this.acc++; }());",
       debuggee
     );
--- a/devtools/server/tests/unit/test_breakpoint-18.js
+++ b/devtools/server/tests/unit/test_breakpoint-18.js
@@ -46,19 +46,18 @@ add_task(threadClientTest(({ threadClien
 function setBreakpoint(packet, threadClient, client) {
   return new Promise(async resolve => {
     const source = await getSourceById(
       threadClient,
       packet.frame.where.actor
     );
     client.addOneTimeListener("resumed", resolve);
 
-    source.setBreakpoint({ line: 3 }).then(() => {
-      threadClient.resume();
-    });
+    threadClient.setBreakpoint({ sourceUrl: source.url, line: 3 }, {});
+    threadClient.resume();
   });
 }
 
 function testDbgStatement({ why }) {
   // Should continue to the debugger statement.
   Assert.equal(why.type, "debuggerStatement");
   // Not break on another offset from the same line (that isn't an entry point
   // to the line)
--- a/devtools/server/tests/unit/test_breakpoint-19.js
+++ b/devtools/server/tests/unit/test_breakpoint-19.js
@@ -21,22 +21,16 @@ function setUpCode(debuggee) {
     debuggee,
     "1.8",
     URL
   );
   /* eslint-enable */
 }
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
-  const source = await getSource(threadClient, URL);
-  const [response ] = await setBreakpoint(source, {line: 2});
-  ok(!response.error);
-
-  const actor = response.actor;
-  ok(actor);
+  setBreakpoint(threadClient, { sourceUrl: URL, line: 2});
 
   await executeOnNextTickAndWaitForPause(() => setUpCode(debuggee), client);
   await resume(threadClient);
 
   const packet = await executeOnNextTickAndWaitForPause(debuggee.test, client);
   equal(packet.why.type, "breakpoint");
-  notEqual(packet.why.actors.indexOf(actor), -1);
 }));
--- a/devtools/server/tests/unit/test_breakpoint-20.js
+++ b/devtools/server/tests/unit/test_breakpoint-20.js
@@ -29,56 +29,46 @@ const testBreakpoint = async function(th
 
   evalTestCode();
   equal(gDebuggee.functions.length, 1,
         "The test code should have added a function.");
 
   // Set a breakpoint in the test source.
 
   const source = await getSource(threadClient, "test.js");
-  const [response ] = await setBreakpoint(source, {
-    line: 3,
-  });
-  ok(!response.error, "Shouldn't get an error setting the BP.");
-  ok(!response.actualLocation,
-     "Shouldn't get an actualLocation, the location we provided was good.");
-  const bpActor = response.actor;
+  setBreakpoint(threadClient, { sourceUrl: source.url, line: 3 });
 
   await resume(threadClient);
 
   // Load the test source again.
 
   evalTestCode();
   equal(gDebuggee.functions.length, 2,
         "The test code should have added another function.");
 
   // Should hit our breakpoint in a script defined by the first instance of the
   // test source.
 
   const bpPause1 = await executeOnNextTickAndWaitForPause(gDebuggee.functions[0],
                                                           gClient);
   equal(bpPause1.why.type, "breakpoint",
         "Should pause because of hitting our breakpoint (not debugger statement).");
-  equal(bpPause1.why.actors[0], bpActor,
-        "And the breakpoint actor should be correct.");
   const dbgStmtPause1 = await executeOnNextTickAndWaitForPause(() => resume(threadClient),
                                                                gClient);
   equal(dbgStmtPause1.why.type, "debuggerStatement",
         "And we should hit the debugger statement after the pause.");
   await resume(threadClient);
 
   // Should also hit our breakpoint in a script defined by the second instance
   // of the test source.
 
   const bpPause2 = await executeOnNextTickAndWaitForPause(gDebuggee.functions[1],
                                                           gClient);
   equal(bpPause2.why.type, "breakpoint",
         "Should pause because of hitting our breakpoint (not debugger statement).");
-  equal(bpPause2.why.actors[0], bpActor,
-        "And the breakpoint actor should be correct.");
   const dbgStmtPause2 = await executeOnNextTickAndWaitForPause(() => resume(threadClient),
                                                                gClient);
   equal(dbgStmtPause2.why.type, "debuggerStatement",
         "And we should hit the debugger statement after the pause.");
 
   finishClient(gClient);
 };
 
--- a/devtools/server/tests/unit/test_breakpoint-21.js
+++ b/devtools/server/tests/unit/test_breakpoint-21.js
@@ -17,27 +17,26 @@ add_task(threadClientTest(async ({ threa
   let packet = await executeOnNextTickAndWaitForPause(() => {
     evalCode(debuggee);
   }, client);
   const source = await getSourceById(
       threadClient,
       packet.frame.where.actor
     );
   const location = {
+    sourceUrl: source.url,
     line: debuggee.line0 + 8,
   };
 
-  const [res, bpClient] = await setBreakpoint(source, location);
-  ok(!res.error);
+  setBreakpoint(threadClient, location);
 
   await resume(threadClient);
   packet = await waitForPause(client);
   Assert.equal(packet.type, "paused");
   Assert.equal(packet.why.type, "breakpoint");
-  Assert.equal(packet.why.actors[0], bpClient.actor);
   Assert.equal(packet.frame.where.actor, source.actor);
   Assert.equal(packet.frame.where.line, location.line);
 
   await resume(threadClient);
 }));
 
 /* eslint-disable */
 function evalCode(debuggee) {
--- a/devtools/server/tests/unit/test_conditional_breakpoint-01.js
+++ b/devtools/server/tests/unit/test_conditional_breakpoint-01.js
@@ -29,38 +29,36 @@ function run_test() {
 function test_simple_breakpoint() {
   let hitBreakpoint = false;
 
   gThreadClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(
       gThreadClient,
       packet.frame.where.actor
     );
-    source.setBreakpoint({
-      line: 3,
-      options: { condition: "a === 1" },
-    }).then(function([response, bpClient]) {
-      gThreadClient.addOneTimeListener("paused", function(event, packet) {
-        Assert.equal(hitBreakpoint, false);
-        hitBreakpoint = true;
+    const location = { sourceUrl: source.url, line: 3 };
+    gThreadClient.setBreakpoint(location, { condition: "a === 1" });
+    gThreadClient.addOneTimeListener("paused", function(event, packet) {
+      Assert.equal(hitBreakpoint, false);
+      hitBreakpoint = true;
+
+      // Check the return value.
+      Assert.equal(packet.why.type, "breakpoint");
+      Assert.equal(packet.frame.where.line, 3);
 
-        // Check the return value.
-        Assert.equal(packet.why.type, "breakpoint");
-        Assert.equal(packet.frame.where.line, 3);
+      // Remove the breakpoint.
+      gThreadClient.removeBreakpoint(location);
 
-        // Remove the breakpoint.
-        bpClient.remove(function(response) {
-          gThreadClient.resume(function() {
-            finishClient(gClient);
-          });
-        });
+      gThreadClient.resume(function() {
+        finishClient(gClient);
       });
-      // Continue until the breakpoint is hit.
-      gThreadClient.resume();
     });
+
+    // Continue until the breakpoint is hit.
+    gThreadClient.resume();
   });
 
   /* eslint-disable */
   Cu.evalInSandbox("debugger;\n" +   // 1
                    "var a = 1;\n" +  // 2
                    "var b = 2;\n",  // 3
                    gDebuggee,
                    "1.8",
--- a/devtools/server/tests/unit/test_conditional_breakpoint-02.js
+++ b/devtools/server/tests/unit/test_conditional_breakpoint-02.js
@@ -27,39 +27,35 @@ function run_test() {
 }
 
 function test_simple_breakpoint() {
   gThreadClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(
       gThreadClient,
       packet.frame.where.actor
     );
-    await source.setBreakpoint({
-      line: 3,
-      options: { condition: "a === 2" },
+    const location1 = { sourceUrl: source.url, line: 3 };
+    gThreadClient.setBreakpoint(location1, { condition: "a === 2" });
+    const location2 = { sourceUrl: source.url, line: 4 };
+    gThreadClient.setBreakpoint(location2, { condition: "a === 1" });
+    gThreadClient.addOneTimeListener("paused", function(event, packet) {
+      // Check the return value.
+      Assert.equal(packet.why.type, "breakpoint");
+      Assert.equal(packet.frame.where.line, 4);
+
+      // Remove the breakpoint.
+      gThreadClient.removeBreakpoint(location2);
+
+      gThreadClient.resume(function() {
+        finishClient(gClient);
+      });
     });
-    source.setBreakpoint({
-      line: 4,
-      options: { condition: "a === 1" },
-    }).then(function([response, bpClient]) {
-      gThreadClient.addOneTimeListener("paused", function(event, packet) {
-        // Check the return value.
-        Assert.equal(packet.why.type, "breakpoint");
-        Assert.equal(packet.frame.where.line, 4);
 
-        // Remove the breakpoint.
-        bpClient.remove(function(response) {
-          gThreadClient.resume(function() {
-            finishClient(gClient);
-          });
-        });
-      });
-      // Continue until the breakpoint is hit.
-      gThreadClient.resume();
-    });
+    // Continue until the breakpoint is hit.
+    gThreadClient.resume();
   });
 
   /* eslint-disable */
   Cu.evalInSandbox("debugger;\n" +   // 1
                    "var a = 1;\n" +  // 2
                    "var b = 2;\n" +  // 3
                    "b++;" +          // 4
                    "debugger;",      // 5
--- a/devtools/server/tests/unit/test_conditional_breakpoint-03.js
+++ b/devtools/server/tests/unit/test_conditional_breakpoint-03.js
@@ -27,35 +27,33 @@ function run_test() {
 }
 
 function test_simple_breakpoint() {
   gThreadClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(
       gThreadClient,
       packet.frame.where.actor
     );
-    source.setBreakpoint({
-      line: 3,
-      options: { condition: "throw new Error()" },
-    }).then(function([response, bpClient]) {
-      gThreadClient.addOneTimeListener("paused", function(event, packet) {
-        // Check the return value.
-        Assert.equal(packet.why.type, "breakpointConditionThrown");
-        Assert.equal(packet.frame.where.line, 3);
+    const location = { sourceUrl: source.url, line: 3 };
+    gThreadClient.setBreakpoint(location, { condition: "throw new Error()" });
+    gThreadClient.addOneTimeListener("paused", function(event, packet) {
+      // Check the return value.
+      Assert.equal(packet.why.type, "breakpointConditionThrown");
+      Assert.equal(packet.frame.where.line, 3);
 
-        // Remove the breakpoint.
-        bpClient.remove(function(response) {
-          gThreadClient.resume(function() {
-            finishClient(gClient);
-          });
-        });
+      // Remove the breakpoint.
+      gThreadClient.removeBreakpoint(location);
+
+      gThreadClient.resume(function() {
+        finishClient(gClient);
       });
-      // Continue until the breakpoint is hit.
-      gThreadClient.resume();
     });
+
+    // Continue until the breakpoint is hit.
+    gThreadClient.resume();
   });
 
   /* eslint-disable */
   Cu.evalInSandbox("debugger;\n" +   // 1
                    "var a = 1;\n" +  // 2
                    "var b = 2;\n",  // 3
                    gDebuggee,
                    "1.8",
--- a/devtools/server/tests/unit/test_logpoint-01.js
+++ b/devtools/server/tests/unit/test_logpoint-01.js
@@ -29,20 +29,20 @@ function run_test() {
 function test_simple_breakpoint() {
   gThreadClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(
       gThreadClient,
       packet.frame.where.actor
     );
 
     // Set a logpoint which should invoke console.log.
-    await source.setBreakpoint({
+    gThreadClient.setBreakpoint({
+      sourceUrl: source.url,
       line: 4,
-      options: { logValue: "a" },
-    });
+    }, { logValue: "a" });
 
     // Execute the rest of the code.
     gThreadClient.resume();
   });
 
   // Sandboxes don't have a console available so we add our own.
   /* eslint-disable */
   Cu.evalInSandbox("var console = { log: v => { this.logValue = v } };\n" + // 1
--- a/devtools/server/tests/unit/test_logpoint-02.js
+++ b/devtools/server/tests/unit/test_logpoint-02.js
@@ -29,20 +29,20 @@ function run_test() {
 function test_simple_breakpoint() {
   gThreadClient.addOneTimeListener("paused", async function(event, packet) {
     const source = await getSourceById(
       gThreadClient,
       packet.frame.where.actor
     );
 
     // Set a logpoint which should invoke console.log.
-    await source.setBreakpoint({
+    gThreadClient.setBreakpoint({
+      sourceUrl: source.url,
       line: 5,
-      options: { logValue: "a", condition: "a === 5" },
-    });
+    }, { logValue: "a", condition: "a === 5" });
 
     // Execute the rest of the code.
     gThreadClient.resume();
   });
 
   // Sandboxes don't have a console available so we add our own.
   /* eslint-disable */
   Cu.evalInSandbox("var console = { log: v => { this.logValue = v } };\n" + // 1
--- a/devtools/server/tests/unit/test_setBreakpoint-at-the-beginning-of-a-line.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-at-the-beginning-of-a-line.js
@@ -1,36 +1,28 @@
 "use strict";
 
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
-  const location = { line: 4, column: 2 };
-  let [packet, breakpointClient] = await setBreakpoint(
-    sourceClient,
-    location
-  );
+  const location = { sourceUrl: source.url, line: 4, column: 2 };
+  setBreakpoint(threadClient, location);
 
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
-
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
 
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
 
   const frame = packet.frame;
   Assert.equal(frame.where.actor, source.actor);
   Assert.equal(frame.where.line, location.line);
   Assert.equal(frame.where.column, 6);
 
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value.type, "undefined");
--- a/devtools/server/tests/unit/test_setBreakpoint-at-the-beginning-of-a-minified-fn.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-at-the-beginning-of-a-minified-fn.js
@@ -1,38 +1,30 @@
 "use strict";
 
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column-minified.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
   // Pause inside of the nested function so we can make sure that we don't
   // add any other breakpoints at other places on this line.
-  const location = { line: 3, column: 47 };
-  let [packet, breakpointClient] = await setBreakpoint(
-    sourceClient,
-    location
-  );
+  const location = { sourceUrl: source.url, line: 3, column: 47 };
+  setBreakpoint(threadClient, location);
 
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
-
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
 
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
 
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   Assert.equal(where.column, 52);
 
   const variables = frame.environment.bindings.variables;
--- a/devtools/server/tests/unit/test_setBreakpoint-at-the-end-of-a-line.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-at-the-end-of-a-line.js
@@ -1,36 +1,28 @@
 "use strict";
 
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
-  const location = { line: 4, column: 42 };
-  let [packet, breakpointClient] = await setBreakpoint(
-    sourceClient,
-    location
-  );
+  const location = { sourceUrl: source.url, line: 4, column: 42 };
+  setBreakpoint(threadClient, location);
 
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
-
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
 
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
 
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   Assert.equal(where.column, 28);
 
   const variables = frame.environment.bindings.variables;
--- a/devtools/server/tests/unit/test_setBreakpoint-at-the-end-of-a-minified-fn.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-at-the-end-of-a-minified-fn.js
@@ -1,38 +1,30 @@
 "use strict";
 
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column-minified.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
   // Pause inside of the nested function so we can make sure that we don't
   // add any other breakpoints at other places on this line.
-  const location = { line: 3, column: 81 };
-  let [packet, breakpointClient] = await setBreakpoint(
-    sourceClient,
-    location
-  );
+  const location = { sourceUrl: source.url, line: 3, column: 81 };
+  setBreakpoint(threadClient, location);
 
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
-
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
 
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
 
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   Assert.equal(where.column, 81);
 
   const variables = frame.environment.bindings.variables;
--- a/devtools/server/tests/unit/test_setBreakpoint-on-column-in-gcd-script.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-column-in-gcd-script.js
@@ -3,36 +3,31 @@
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column-in-gcd-script.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client, targetFront }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScriptWithOptions(SOURCE_URL, {target: debuggee, ignoreCache: true});
   Cu.forceGC(); Cu.forceGC(); Cu.forceGC();
 
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
-  const location = { line: 6, column: 17 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: source.url, line: 6, column: 17 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     reload(targetFront).then(function() {
       loadSubScriptWithOptions(SOURCE_URL, {target: debuggee, ignoreCache: true});
     });
   }, client);
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   const frame = packet.frame;
   const where = frame.where;
-  Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   Assert.equal(where.column, location.column);
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value, 1);
   Assert.equal(variables.b.value.type, "undefined");
   Assert.equal(variables.c.value.type, "undefined");
   await resume(threadClient);
 }, { doNotRunWorker: true }));
--- a/devtools/server/tests/unit/test_setBreakpoint-on-column.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-column.js
@@ -1,31 +1,27 @@
 "use strict";
 
 const SOURCE_URL = getFileUrl("setBreakpoint-on-column.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
-  const location = { line: 4, column: 17 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: source.url, line: 4, column: 17 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   Assert.equal(where.column, location.column);
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value, 1);
   Assert.equal(variables.b.value.type, "undefined");
--- a/devtools/server/tests/unit/test_setBreakpoint-on-line-in-gcd-script.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-line-in-gcd-script.js
@@ -3,35 +3,30 @@
 const SOURCE_URL = getFileUrl("setBreakpoint-on-line-in-gcd-script.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client, targetFront }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScriptWithOptions(SOURCE_URL, {target: debuggee, ignoreCache: true});
   Cu.forceGC(); Cu.forceGC(); Cu.forceGC();
 
   const { source } = await promise;
-  const sourceClient = threadClient.source(source);
 
-  const location = { line: 7 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: source.url, line: 7 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     reload(targetFront).then(function() {
       loadSubScriptWithOptions(SOURCE_URL, {target: debuggee, ignoreCache: true});
     });
   }, client);
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   const frame = packet.frame;
   const where = frame.where;
-  Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value, 1);
   Assert.equal(variables.b.value.type, "undefined");
   Assert.equal(variables.c.value.type, "undefined");
   await resume(threadClient);
 }, { doNotRunWorker: true }));
--- a/devtools/server/tests/unit/test_setBreakpoint-on-line-with-multiple-offsets.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-line-with-multiple-offsets.js
@@ -3,45 +3,41 @@
 const SOURCE_URL = getFileUrl("setBreakpoint-on-line-with-multiple-offsets.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
   const sourceClient = threadClient.source(source);
 
-  const location = { line: 4 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: sourceClient.url, line: 4 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  let packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
   Assert.equal(packet.type, "paused");
   let why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   let frame = packet.frame;
   let where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   let variables = frame.environment.bindings.variables;
   Assert.equal(variables.i.value.type, "undefined");
 
   packet = await executeOnNextTickAndWaitForPause(
     () => resume(threadClient),
     client
   );
   Assert.equal(packet.type, "paused");
   why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   frame = packet.frame;
   where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   variables = frame.environment.bindings.variables;
   Assert.equal(variables.i.value, 0);
 
   await resume(threadClient);
--- a/devtools/server/tests/unit/test_setBreakpoint-on-line-with-multiple-statements.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-line-with-multiple-statements.js
@@ -3,29 +3,26 @@
 const SOURCE_URL = getFileUrl("setBreakpoint-on-line-with-multiple-statements.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
   const sourceClient = threadClient.source(source);
 
-  const location = { line: 4 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: sourceClient.url, line: 4 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value.type, "undefined");
   Assert.equal(variables.b.value.type, "undefined");
   Assert.equal(variables.c.value.type, "undefined");
--- a/devtools/server/tests/unit/test_setBreakpoint-on-line.js
+++ b/devtools/server/tests/unit/test_setBreakpoint-on-line.js
@@ -3,29 +3,26 @@
 const SOURCE_URL = getFileUrl("setBreakpoint-on-line.js");
 
 add_task(threadClientTest(async ({ threadClient, debuggee, client }) => {
   const promise = waitForNewSource(threadClient, SOURCE_URL);
   loadSubScript(SOURCE_URL, debuggee);
   const { source } = await promise;
   const sourceClient = threadClient.source(source);
 
-  const location = { line: 5 };
-  let [packet, breakpointClient] = await setBreakpoint(sourceClient, location);
-  Assert.ok(!packet.isPending);
-  Assert.equal(false, "actualLocation" in packet);
+  const location = { sourceUrl: sourceClient.url, line: 5 };
+  setBreakpoint(threadClient, location);
 
-  packet = await executeOnNextTickAndWaitForPause(function() {
+  const packet = await executeOnNextTickAndWaitForPause(function() {
     Cu.evalInSandbox("f()", debuggee);
   }, client);
   Assert.equal(packet.type, "paused");
   const why = packet.why;
   Assert.equal(why.type, "breakpoint");
   Assert.equal(why.actors.length, 1);
-  Assert.equal(why.actors[0], breakpointClient.actor);
   const frame = packet.frame;
   const where = frame.where;
   Assert.equal(where.actor, source.actor);
   Assert.equal(where.line, location.line);
   const variables = frame.environment.bindings.variables;
   Assert.equal(variables.a.value, 1);
   Assert.equal(variables.b.value.type, "undefined");
   Assert.equal(variables.c.value.type, "undefined");
--- a/devtools/server/tests/unit/test_stepping-08.js
+++ b/devtools/server/tests/unit/test_stepping-08.js
@@ -13,17 +13,17 @@ add_task(threadClientTest(async ({ threa
     () => evaluateTestCode(debuggee), client);
   equal(dbgStmt.frame.where.line, 3, "Should be at debugger statement on line 3");
 
   dumpn("Setting breakpoint in innerFunction");
   const source = await getSourceById(
     threadClient,
     dbgStmt.frame.where.actor
   );
-  await source.setBreakpoint({ line: 7 });
+  await threadClient.setBreakpoint({ sourceUrl: source.url, line: 7 }, {});
 
   dumpn("Step in to innerFunction");
   const step1 = await stepIn(client, threadClient);
   equal(step1.frame.where.line, 7);
 
   dumpn("Step out of innerFunction");
   const step2 = await stepOut(client, threadClient);
   // The bug was that we'd stop again at the breakpoint on line 7.
--- a/devtools/server/tests/unit/xpcshell.ini
+++ b/devtools/server/tests/unit/xpcshell.ini
@@ -123,18 +123,20 @@ skip-if = true # breakpoint sliding is n
 [test_breakpoint-09.js]
 [test_breakpoint-10.js]
 [test_breakpoint-11.js]
 [test_breakpoint-12.js]
 skip-if = true # breakpoint sliding is not supported bug 1525685
 [test_breakpoint-13.js]
 [test_breakpoint-14.js]
 [test_breakpoint-15.js]
+skip-if = true # tests for breakpoint actors are obsolete bug 1524374
 [test_breakpoint-16.js]
 [test_breakpoint-17.js]
+skip-if = true # tests for breakpoint actors are obsolete bug 1524374
 [test_breakpoint-18.js]
 [test_breakpoint-19.js]
 skip-if = true
 reason = bug 1104838
 [test_breakpoint-20.js]
 [test_breakpoint-21.js]
 [test_breakpoint-22.js]
 skip-if = true # breakpoint sliding is not supported bug 1525685
@@ -204,16 +206,17 @@ skip-if = true # breakpoint sliding is n
 [test_pause_exceptions-03.js]
 [test_longstringactor.js]
 [test_longstringgrips-01.js]
 [test_longstringgrips-02.js]
 [test_source-01.js]
 [test_source-02.js]
 [test_wasm_source-01.js]
 [test_breakpoint-actor-map.js]
+skip-if = true # tests for breakpoint actors are obsolete bug 1524374
 [test_unsafeDereference.js]
 [test_add_actors.js]
 [test_ignore_caught_exceptions.js]
 [test_ignore_no_interface_exceptions.js]
 [test_requestTypes.js]
 reason = bug 937197
 [test_layout-reflows-observer.js]
 [test_protocolSpec.js]
deleted file mode 100644
--- a/devtools/shared/client/breakpoint-client.js
+++ /dev/null
@@ -1,100 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-const promise = require("devtools/shared/deprecated-sync-thenables");
-
-const eventSource = require("devtools/shared/client/event-source");
-const {arg, DebuggerClient} = require("devtools/shared/client/debugger-client");
-
-/**
- * Breakpoint clients are used to remove breakpoints that are no longer used.
- *
- * @param client DebuggerClient
- *        The debugger client parent.
- * @param sourceClient SourceClient
- *        The source where this breakpoint exists
- * @param actor string
- *        The actor ID for this breakpoint.
- * @param location object
- *        The location of the breakpoint. This is an object with two properties:
- *        url and line.
- * @param options object
- *        Any options associated with the breakpoint
- */
-function BreakpointClient(client, sourceClient, actor, location, options) {
-  this._client = client;
-  this._actor = actor;
-  this.location = location;
-  this.location.actor = sourceClient.actor;
-  this.location.url = sourceClient.url;
-  this.source = sourceClient;
-  this.request = this._client.request;
-  this.options = options;
-}
-
-BreakpointClient.prototype = {
-
-  _actor: null,
-  get actor() {
-    return this._actor;
-  },
-  get _transport() {
-    return this._client._transport;
-  },
-
-  /**
-   * Remove the breakpoint from the server.
-   */
-  remove: DebuggerClient.requester({
-    type: "delete",
-  }),
-
-  // Send a setOptions request to newer servers.
-  setOptionsRequester: DebuggerClient.requester({
-    type: "setOptions",
-    options: arg(0),
-  }, {
-    before(packet) {
-      this.options = packet.options;
-      return packet;
-    },
-  }),
-
-  /**
-   * Set any options for this breakpoint.
-   */
-  setOptions: function(options) {
-    if (this._client.mainRoot.traits.nativeLogpoints) {
-      return this.setOptionsRequester(options).then(() => this);
-    }
-    // Older servers need to reinstall breakpoints when the condition changes.
-    const deferred = promise.defer();
-
-    const info = {
-      line: this.location.line,
-      column: this.location.column,
-      options,
-    };
-
-    // Remove the current breakpoint and add a new one with the specified
-    // information.
-    this.remove(response => {
-      if (response && response.error) {
-        deferred.reject(response);
-        return;
-      }
-
-      deferred.resolve(this.source.setBreakpoint(info).then(([, newBreakpoint]) => {
-        return newBreakpoint;
-      }));
-    });
-    return deferred;
-  },
-};
-
-eventSource(BreakpointClient.prototype);
-
-module.exports = BreakpointClient;
--- a/devtools/shared/client/moz.build
+++ b/devtools/shared/client/moz.build
@@ -1,17 +1,16 @@
 # -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
 # vim: set filetype=python:
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 DevToolsModules(
     'array-buffer-client.js',
-    'breakpoint-client.js',
     'connection-manager.js',
     'constants.js',
     'debugger-client.js',
     'environment-client.js',
     'event-source.js',
     'long-string-client.js',
     'object-client.js',
     'property-iterator-client.js',
--- a/devtools/shared/client/source-client.js
+++ b/devtools/shared/client/source-client.js
@@ -1,16 +1,15 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 "use strict";
 
 const {arg, DebuggerClient} = require("devtools/shared/client/debugger-client");
-loader.lazyRequireGetter(this, "BreakpointClient", "devtools/shared/client/breakpoint-client");
 
 const noop = () => {};
 
 /**
  * A SourceClient provides a way to access the source text of a script.
  *
  * @param client ThreadClient
  *        The thread client parent.
@@ -144,97 +143,16 @@ SourceClient.prototype = {
       const newResponse = {
         source: resp.substring,
         contentType: contentType,
       };
       return newResponse;
     });
   },
 
-  /**
-   * Request to set a breakpoint in the specified location.
-   *
-   * @param object location
-   *        The location and options of the breakpoint in
-   *        the form of { line[, column, options] }.
-   */
-  setBreakpoint: function({ line, column, options }) {
-    // A helper function that sets the breakpoint.
-    const doSetBreakpoint = callback => {
-      const location = {
-        line,
-        column,
-      };
-
-      const packet = {
-        to: this.actor,
-        type: "setBreakpoint",
-        location,
-        options,
-      };
-
-      // Older servers only support conditions, not a more general options
-      // object. Transform the packet to support the older format.
-      if (options && !this._client.mainRoot.traits.nativeLogpoints) {
-        delete packet.options;
-        if (options.logValue) {
-          // Emulate log points by setting a condition with a call to console.log,
-          // which always returns false so the server will never pause.
-          packet.condition = `console.log(${options.logValue})`;
-        } else {
-          packet.condition = options.condition;
-        }
-      }
-
-      return this._client.request(packet).then(response => {
-        // Ignoring errors, since the user may be setting a breakpoint in a
-        // dead script that will reappear on a page reload.
-        let bpClient;
-        if (response.actor) {
-          bpClient = new BreakpointClient(
-            this._client,
-            this,
-            response.actor,
-            location,
-            options
-          );
-        }
-        if (callback) {
-          callback();
-        }
-        return [response, bpClient];
-      });
-    };
-
-    // With async sourcemap processing removed from the server, it is not
-    // necessary for clients to pause the debuggee before adding breakpoints.
-    if (this._client.mainRoot.traits.breakpointWhileRunning) {
-      return doSetBreakpoint();
-    }
-
-    // If the debuggee is paused, just set the breakpoint.
-    if (this._activeThread.paused) {
-      return doSetBreakpoint();
-    }
-    // Otherwise, force a pause in order to set the breakpoint.
-    return this._activeThread.interrupt().then(response => {
-      if (response.error) {
-        // Can't set the breakpoint if pausing failed.
-        return response;
-      }
-
-      const { type, why } = response;
-      const cleanUp = type == "paused" && why.type == "interrupted"
-            ? () => this._activeThread.resume()
-            : noop;
-
-      return doSetBreakpoint(cleanUp);
-    });
-  },
-
   setPausePoints: function(pausePoints) {
     const packet = {
       to: this._form.actor,
       type: "setPausePoints",
       pausePoints,
     };
     return this._client.request(packet);
   },
--- a/devtools/shared/client/thread-client.js
+++ b/devtools/shared/client/thread-client.js
@@ -658,16 +658,27 @@ ThreadClient.prototype = {
     packet.type === ThreadStateTypes.detached && this._clearThreadGrips();
     this.client._eventsEnabled && this.emit(packet.type, packet);
   },
 
   getLastPausePacket: function() {
     return this._lastPausePacket;
   },
 
+  setBreakpoint: DebuggerClient.requester({
+    type: "setBreakpoint",
+    location: arg(0),
+    options: arg(1),
+  }),
+
+  removeBreakpoint: DebuggerClient.requester({
+    type: "removeBreakpoint",
+    location: arg(0),
+  }),
+
   /**
    * Requests to set XHR breakpoint
    * @param string path
    *        pause when url contains `path`
    * @param string method
    *        pause when method of request is `method`
    */
   setXHRBreakpoint: DebuggerClient.requester({
deleted file mode 100644
--- a/devtools/shared/specs/breakpoint.js
+++ /dev/null
@@ -1,22 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-"use strict";
-
-const {Arg, generateActorSpec} = require("devtools/shared/protocol");
-
-const breakpointSpec = generateActorSpec({
-  typeName: "breakpoint",
-
-  methods: {
-    delete: {},
-
-    setOptions: {
-      request: {
-        options: Arg(0, "nullable:json"),
-      },
-    },
-  },
-});
-
-exports.breakpointSpec = breakpointSpec;
--- a/devtools/shared/specs/index.js
+++ b/devtools/shared/specs/index.js
@@ -37,22 +37,16 @@ const Types = exports.__TypesForTests = 
     spec: "devtools/shared/specs/addon/webextension-inspected-window",
     front: "devtools/shared/fronts/addon/webextension-inspected-window",
   },
   {
     types: ["animationplayer", "animations"],
     spec: "devtools/shared/specs/animation",
     front: "devtools/shared/fronts/animation",
   },
-  /* breakpoint has old fashion client and no front */
-  {
-    types: ["breakpoint"],
-    spec: "devtools/shared/specs/breakpoint",
-    front: null,
-  },
   {
     types: ["frame-snapshot", "canvas"],
     spec: "devtools/shared/specs/canvas",
     front: "devtools/shared/fronts/canvas",
   },
   {
     types: ["changes"],
     spec: "devtools/shared/specs/changes",
--- a/devtools/shared/specs/moz.build
+++ b/devtools/shared/specs/moz.build
@@ -9,17 +9,16 @@ DIRS += [
     'targets',
     'worker',
 ]
 
 DevToolsModules(
     'accessibility.js',
     'actor-registry.js',
     'animation.js',
-    'breakpoint.js',
     'canvas.js',
     'changes.js',
     'css-properties.js',
     'csscoverage.js',
     'device.js',
     'emulation.js',
     'environment.js',
     'frame.js',
--- a/devtools/shared/specs/script.js
+++ b/devtools/shared/specs/script.js
@@ -4,16 +4,27 @@
 "use strict";
 
 const {Arg, RetVal, generateActorSpec} = require("devtools/shared/protocol");
 
 const threadSpec = generateActorSpec({
   typeName: "context",
 
   methods: {
+    setBreakpoint: {
+      request: {
+        location: Arg(0, "json"),
+        options: Arg(1, "json"),
+      },
+    },
+    removeBreakpoint: {
+      request: {
+        location: Arg(0, "json"),
+      },
+    },
     setXHRBreakpoint: {
       request: {
         path: Arg(0, "string"),
         method: Arg(1, "string"),
       },
       response: {
         value: RetVal("boolean"),
       },
--- a/devtools/shared/specs/source.js
+++ b/devtools/shared/specs/source.js
@@ -50,22 +50,12 @@ const sourceSpec = generateActorSpec({
     },
     blackbox: {
       request: { range: Arg(0, "nullable:json") },
       response: { pausedInSource: RetVal("boolean") },
     },
     unblackbox: {
       request: { range: Arg(0, "nullable:json") },
     },
-    setBreakpoint: {
-      request: {
-        location: {
-          line: Arg(0, "number"),
-          column: Arg(1, "nullable:number"),
-        },
-        options: Arg(2, "nullable:json"),
-      },
-      response: RetVal("json"),
-    },
   },
 });
 
 exports.sourceSpec = sourceSpec;
--- a/toolkit/components/thumbnails/test/browser.ini
+++ b/toolkit/components/thumbnails/test/browser.ini
@@ -32,15 +32,15 @@ skip-if = verify
 [browser_thumbnails_bg_captureIfMissing.js]
 [browser_thumbnails_bg_image_capture.js]
 [browser_thumbnails_bg_topsites.js]
 [browser_thumbnails_bug726727.js]
 [browser_thumbnails_bug727765.js]
 [browser_thumbnails_bug818225.js]
 skip-if = (verify && debug && (os == 'linux'))
 [browser_thumbnails_capture.js]
-skip-if = (os == "mac" && !debug) || (os == 'win') # bug 1314039 # Bug 1345418
+skip-if = true # bug 1314039 # Bug 1345418
 [browser_thumbnails_expiration.js]
 [browser_thumbnails_privacy.js]
 [browser_thumbnails_redirect.js]
 [browser_thumbnails_storage.js]
 [browser_thumbnails_storage_migrate3.js]
 [browser_thumbnails_update.js]