Bug 1725430: disable screenshot shortcut for extension when screenshots.browser.component.enabled is true. r=emalysz,fluent-reviewers,flod

Differential Revision: https://phabricator.services.mozilla.com/D125850

browser/components/customizableui/CustomizableWidgets.jsm

@@ -525,6 +525,7 @@ if (Services.prefs.getBoolPref("identity.fxaccounts.enabled")) {
 if (!screenshotsDisabled) {
   CustomizableWidgets.push({
     id: "screenshot-button",
+    shortcutId: "key_screenshot",
     l10nId: "screenshot-toolbarbutton",
     onCommand(aEvent) {
       if (SCREENSHOT_BROWSER_COMPONENT) {
@@ -533,7 +534,11 @@ if (!screenshotsDisabled) {
           "menuitem-screenshot"
         );
       } else {
-        Services.obs.notifyObservers(null, "menuitem-screenshot-extension");
+        Services.obs.notifyObservers(
+          null,
+          "menuitem-screenshot-extension",
+          "toolbar"
+        );
       }
     },
     onCreated(aNode) {