--- a/browser/devtools/webconsole/test/browser_webconsole_bug_585956_console_trace.js
+++ b/browser/devtools/webconsole/test/browser_webconsole_bug_585956_console_trace.js
@@ -28,19 +28,19 @@ function test() {
     let node = [...result.matched][0];
     ok(node, "found trace log node");
 
     let obj = node._messageObject;
     ok(obj, "console.trace message object");
 
     // The expected stack trace object.
     let stacktrace = [
-      { filename: TEST_URI, functionName: "window.foobar585956c", language: 2, lineNumber: 9 },
-      { filename: TEST_URI, functionName: "foobar585956b", language: 2, lineNumber: 14 },
-      { filename: TEST_URI, functionName: "foobar585956a", language: 2, lineNumber: 18 },
-      { filename: TEST_URI, functionName: "", language: 2, lineNumber: 21 }
+      { columnNumber: 2, filename: TEST_URI, functionName: "window.foobar585956c", language: 2, lineNumber: 9 },
+      { columnNumber: 9, filename: TEST_URI, functionName: "foobar585956b", language: 2, lineNumber: 14 },
+      { columnNumber: 9, filename: TEST_URI, functionName: "foobar585956a", language: 2, lineNumber: 18 },
+      { columnNumber: 0, filename: TEST_URI, functionName: "", language: 2, lineNumber: 21 }
     ];
 
     ok(obj._stacktrace, "found stacktrace object");
     is(obj._stacktrace.toSource(), stacktrace.toSource(), "stacktrace is correct");
     isnot(node.textContent.indexOf("bug-585956"), -1, "found file name");
   }
 }

--- a/browser/devtools/webconsole/test/browser_webconsole_console_trace_duplicates.js
+++ b/browser/devtools/webconsole/test/browser_webconsole_console_trace_duplicates.js
@@ -8,22 +8,32 @@ function test() {
   Task.spawn(runner).then(finishTest);
 
   function* runner() {
     const {tab} = yield loadTab("data:text/html;charset=utf8,<p>hello");
     const hud = yield openConsole(tab);
 
     content.location = TEST_URI;
 
+    // NB: Now that stack frames include a column number multiple invocations
+    //     on the same line are considered unique. ie:
+    //       |foo(); foo();|
+    //     will generate two distinct trace entries.
     yield waitForMessages({
       webconsole: hud,
       messages: [{
         name: "console.trace output for foo1()",
         text: "foo1()",
-        repeats: 2,
+        consoleTrace: {
+          file: "test-bug_939783_console_trace_duplicates.html",
+          fn: "foo3()",
+        },
+      }, {
+        name: "console.trace output for foo1()",
+        text: "foo1()",
         consoleTrace: {
           file: "test-bug_939783_console_trace_duplicates.html",
           fn: "foo3()",
         },
       }, {
         name: "console.trace output for foo1b()",
         text: "foo1b()",
         consoleTrace: {

--- a/dom/tests/browser/browser_ConsoleAPITests.js
+++ b/dom/tests/browser/browser_ConsoleAPITests.js
@@ -169,20 +169,20 @@ function testConsoleGroup(aMessageObject
   if (aMessageObject.level == "groupEnd") {
     startTimeTest();
   }
 }
 
 function startTraceTest() {
   gLevel = "trace";
   gArgs = [
-    {filename: TEST_URI, functionName: "window.foobar585956c", language: 2, lineNumber: 6},
-    {filename: TEST_URI, functionName: "foobar585956b", language: 2, lineNumber: 11},
-    {filename: TEST_URI, functionName: "foobar585956a", language: 2, lineNumber: 15},
-    {filename: TEST_URI, functionName: "onclick", language: 2, lineNumber: 1}
+    {columnNumber: 8, filename: TEST_URI, functionName: "window.foobar585956c", language: 2, lineNumber: 6},
+    {columnNumber: 15, filename: TEST_URI, functionName: "foobar585956b", language: 2, lineNumber: 11},
+    {columnNumber: 15, filename: TEST_URI, functionName: "foobar585956a", language: 2, lineNumber: 15},
+    {columnNumber: 0, filename: TEST_URI, functionName: "onclick", language: 2, lineNumber: 1}
   ];
 
   let button = gWindow.document.getElementById("test-trace");
   ok(button, "found #test-trace button");
   EventUtils.synthesizeMouseAtCenter(button, {}, gWindow);
 }
 
 function startLocationTest() {