diff --git a/browser/components/extensions/ext-commands.js b/browser/components/extensions/ext-commands.js
deleted file mode 100644
index a00e49603c13..000000000000
--- a/browser/components/extensions/ext-commands.js
+++ /dev/null
@@ -1,53 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-Cu.import("resource://gre/modules/ExtensionUtils.jsm");
-
-var {
-   PlatformInfo,
-} = ExtensionUtils;
-
-// WeakMap[Extension -> Map[name => Command]]
-var commandsMap = new WeakMap();
-
-function Command(description, shortcut) {
-  this.description = description;
-  this.shortcut = shortcut;
-}
-
-/* eslint-disable mozilla/balanced-listeners */
-extensions.on("manifest_commands", (type, directive, extension, manifest) => {
-  let commands = new Map();
-  for (let name of Object.keys(manifest.commands)) {
-    let os = PlatformInfo.os == "win" ? "windows" : PlatformInfo.os;
-    let manifestCommand = manifest.commands[name];
-    let description = manifestCommand.description;
-    let shortcut = manifestCommand.suggested_key[os] || manifestCommand.suggested_key.default;
-    let command = new Command(description, shortcut);
-    commands.set(name, command);
-  }
-  commandsMap.set(extension, commands);
-});
-
-extensions.on("shutdown", (type, extension) => {
-  commandsMap.delete(extension);
-});
-/* eslint-enable mozilla/balanced-listeners */
-
-extensions.registerSchemaAPI("commands", null, (extension, context) => {
-  return {
-    commands: {
-      getAll() {
-        let commands = Array.from(commandsMap.get(extension), ([name, command]) => {
-          return ({
-            name,
-            description: command.description,
-            shortcut: command.shortcut,
-          });
-        });
-        return Promise.resolve(commands);
-      },
-    },
-  };
-});
diff --git a/browser/components/extensions/jar.mn b/browser/components/extensions/jar.mn
index 58aa7f14521a..0d800edeee97 100644
--- a/browser/components/extensions/jar.mn
+++ b/browser/components/extensions/jar.mn
@@ -5,7 +5,6 @@
 browser.jar:
     content/browser/extension.svg
     content/browser/ext-utils.js
-    content/browser/ext-commands.js
     content/browser/ext-contextMenus.js
     content/browser/ext-browserAction.js
     content/browser/ext-pageAction.js
diff --git a/browser/components/extensions/test/browser/browser.ini b/browser/components/extensions/test/browser/browser.ini
index 3e1cd97c0688..b6ee6d060e3f 100644
--- a/browser/components/extensions/test/browser/browser.ini
+++ b/browser/components/extensions/test/browser/browser.ini
@@ -9,7 +9,6 @@ support-files =
   file_popup_api_injection_b.html
 
 [browser_ext_simple.js]
-[browser_ext_commands.js]
 [browser_ext_currentWindow.js]
 [browser_ext_browserAction_simple.js]
 [browser_ext_browserAction_pageAction_icon.js]
diff --git a/browser/components/extensions/test/browser/browser_ext_commands.js b/browser/components/extensions/test/browser/browser_ext_commands.js
deleted file mode 100644
index 098d81d13aaa..000000000000
--- a/browser/components/extensions/test/browser/browser_ext_commands.js
+++ /dev/null
@@ -1,77 +0,0 @@
-/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* vim: set sts=2 sw=2 et tw=80: */
-"use strict";
-
-var {AppConstants} = Cu.import("resource://gre/modules/AppConstants.jsm");
-
-add_task(function* () {
-  let extension = ExtensionTestUtils.loadExtension({
-    manifest: {
-      "name": "Commands Extension",
-      "commands": {
-        "with-desciption": {
-          "suggested_key": {
-            "default": "Ctrl+Shift+Y",
-          },
-          "description": "should have a description",
-        },
-        "without-description": {
-          "suggested_key": {
-            "default": "Ctrl+Shift+D",
-          },
-        },
-        "with-platform-info": {
-          "suggested_key": {
-            "mac": "Ctrl+Shift+M",
-            "linux": "Ctrl+Shift+L",
-            "windows": "Ctrl+Shift+W",
-            "android": "Ctrl+Shift+A",
-          },
-        },
-      },
-    },
-
-    background: function() {
-      browser.test.onMessage.addListener((message, additionalScope) => {
-        browser.commands.getAll((commands) => {
-          browser.test.log(JSON.stringify(commands));
-          browser.test.assertEq(commands.length, 3, "getAll should return an array of commands");
-
-          let command = commands.find(c => c.name == "with-desciption");
-          browser.test.assertEq("should have a description", command.description,
-            "The description should match what is provided in the manifest");
-          browser.test.assertEq("Ctrl+Shift+Y", command.shortcut,
-            "The shortcut should match the default shortcut provided in the manifest");
-
-          command = commands.find(c => c.name == "without-description");
-          browser.test.assertEq(null, command.description,
-            "The description should be empty when it is not provided");
-          browser.test.assertEq("Ctrl+Shift+D", command.shortcut,
-            "The shortcut should match the default shortcut provided in the manifest");
-
-          let platformKeys = {
-            macosx: "M",
-            linux: "L",
-            win: "W",
-            android: "A",
-          };
-
-          command = commands.find(c => c.name == "with-platform-info");
-          let platformKey = platformKeys[additionalScope.platform];
-          let shortcut = `Ctrl+Shift+${platformKey}`;
-          browser.test.assertEq(shortcut, command.shortcut,
-            `The shortcut should match the one provided in the manifest for OS='${additionalScope.platform}'`);
-
-          browser.test.notifyPass("commands");
-        });
-      });
-      browser.test.sendMessage("ready");
-    },
-  });
-
-  yield extension.startup();
-  yield extension.awaitMessage("ready");
-  extension.sendMessage("additional-scope", {platform: AppConstants.platform});
-  yield extension.awaitFinish("commands");
-  yield extension.unload();
-});
diff --git a/browser/components/nsBrowserGlue.js b/browser/components/nsBrowserGlue.js
index dbce85e8fb6a..e6eb2509ced6 100644
--- a/browser/components/nsBrowserGlue.js
+++ b/browser/components/nsBrowserGlue.js
@@ -546,7 +546,6 @@ BrowserGlue.prototype = {
     ExtensionManagement.registerScript("chrome://browser/content/ext-utils.js");
     ExtensionManagement.registerScript("chrome://browser/content/ext-browserAction.js");
     ExtensionManagement.registerScript("chrome://browser/content/ext-pageAction.js");
-    ExtensionManagement.registerScript("chrome://browser/content/ext-commands.js");
     ExtensionManagement.registerScript("chrome://browser/content/ext-contextMenus.js");
     ExtensionManagement.registerScript("chrome://browser/content/ext-desktop-runtime.js");
     ExtensionManagement.registerScript("chrome://browser/content/ext-tabs.js");