--- a/browser/components/touchbar/MacTouchBar.js
+++ b/browser/components/touchbar/MacTouchBar.js
@@ -287,19 +287,16 @@ class TouchBarHelper {
   }
 
   get allItems() {
     let layoutItems = Cc["@mozilla.org/array;1"].createInstance(
       Ci.nsIMutableArray
     );
 
     for (let inputName of Object.keys(kBuiltInInputs)) {
-      if (typeof kBuiltInInputs[inputName].context == "function") {
-        inputName = kBuiltInInputs[inputName].context();
-      }
       let input = this.getTouchBarInput(inputName);
       if (!input) {
         continue;
       }
       layoutItems.appendElement(input);
     }
 
     // Every input must be updated at least once so that all assets (titles,
@@ -331,26 +328,16 @@ class TouchBarHelper {
       : null;
   }
 
   getTouchBarInput(inputName) {
     if (inputName == "SearchPopover" && this._searchPopover) {
       return this._searchPopover;
     }
 
-    // inputName might be undefined if an input's context() returns undefined.
-    if (!inputName || !kBuiltInInputs.hasOwnProperty(inputName)) {
-      return null;
-    }
-
-    // context() may specify that one named input "point" to another.
-    if (typeof kBuiltInInputs[inputName].context == "function") {
-      inputName = kBuiltInInputs[inputName].context();
-    }
-
     if (!inputName || !kBuiltInInputs.hasOwnProperty(inputName)) {
       return null;
     }
 
     let inputData = kBuiltInInputs[inputName];
 
     let item = new TouchBarInput(inputData);
 

--- a/browser/components/touchbar/docs/index.rst
+++ b/browser/components/touchbar/docs/index.rst
@@ -96,22 +96,16 @@ Clarification on some of these propertie
   Telemetry.
 * ``children`` is an array of objects with the same properties as members of
   ``kBuiltInInputs``. When used with an input of type
   ``kInputTypes.SCROLLVIEW``, ``children`` can only contain inputs of type
   ``kInputTypes.BUTTON``. When used with an input of type
   ``kInputTypes.POPOVER``, any input type except another ``kInputTypes.POPOVER``
   can be used.
 
-A final property, ``context``, is also accepted. ``context`` is a function that
-returns a string. The returned string should be the name of a key in
-``kBuiltInInputs``. ``context`` is a useful property if you want to show one
-input in the Touch Bar in one context, and another input in a different context.
-An example of its use follows below.
-
 .. _in that file: https://searchfox.org/mozilla-central/rev/ebe492edacc75bb122a2b380e4cafcca3470864c/browser/components/touchbar/MacTouchBar.js#82
 
 Input types
 -----------
 
 Button
   A simple button. If ``image`` is not specified, the buttons displays the text
   label from ``title``. If both ``image`` and ``title`` are specified, only the
@@ -176,53 +170,16 @@ A simple button
       image: "chrome://browser/skin/back.svg",
       type: kInputTypes.BUTTON,
       callback: () => execCommand("Browser:Back", "Back"),
     },
 
   A button is defined with a title, icon, type, and a callback. The callback
   simply calls the XUL command to go back.
 
-Using ``context``
-  In this example, two main buttons are defined. One focuses the address bar
-  and the other closes the current window. The OpenLocationOrClosePrivateWindow
-  object uses the ``context`` property to display the former in Normal
-  Browsing Mode and the latter in Private Browsing Mode. Note also that
-  ClosePrivateWindow uses ``image`` and ``color`` to be consistent with
-  PBM styling. By including OpenLocationOrClosePrivateWindow as a default input
-  in ``nsTouchBar.mm``, the user can be shown a different Touch Bar depending on
-  whether they are in Normal or Private Browsing Mode.
-
-  .. highlight:: JavaScript
-  .. code::
-
-    OpenLocation: {
-      title: "open-location",
-      image: "chrome://browser/skin/search-glass.svg",
-      type: kInputTypes.MAIN_BUTTON,
-      callback: () => execCommand("Browser:OpenLocation", "OpenLocation"),
-    },
-    ClosePrivateWindow: {
-      title: "close-private-window",
-      image: "hrome://browser/skin/privateBrowsing.svg",
-      type: kInputTypes.MAIN_BUTTON,
-      callback: () => execCommand("cmd_closeWindow", "ClosePrivateWindow"),
-      color: "#8000D7",
-    },
-    OpenLocationOrClosePrivateWindow: {
-      // This is just a forwarder to other inputs.
-      context: () => {
-        if (PrivateBrowsingUtils.isWindowPrivate(BrowserWindowTracker.getTopWindow())) {
-          return "ClosePrivateWindow";
-        } else {
-          return "OpenLocation";
-        }
-      },
-    },
-
 The search popover
   This is the input that occupies the Touch Bar when the address bar is focused.
 
   .. highlight:: JavaScript
   .. code::
 
     SearchPopover: {
       title: "search-popover",