Bug 1777563 - Make 'More Tools -> Task Manager' and about:support point to about:processes instead of about:performance, r=mconley.

Differential Revision: https://phabricator.services.mozilla.com/D150798

browser/base/content/browser-menubar.inc

@@ -401,7 +401,7 @@
               <menu id="browserToolsMenu" data-l10n-id="menu-tools-browser-tools">
                 <menupopup id="menuWebDeveloperPopup">
                   <menuitem id="menu_taskManager"
-                            oncommand="switchToTabHavingURI('about:performance', true)"
+                            oncommand="switchToTabHavingURI('about:processes', true)"
                             data-l10n-id="menu-tools-task-manager"/>
                   <menuitem id="menu_pageSource"
                             key="key_viewSource"

toolkit/content/aboutSupport.xhtml

@@ -198,7 +198,7 @@
             <th class="column" data-l10n-id="app-basics-performance"/>
 
             <td>
-              <a href="about:performance">about:performance</a>
+              <a href="about:processes">about:processes</a>
             </td>
           </tr>