No need for "Shortcuts" pane in Firefox 74 and above

Related issue:
- uBlockOrigin/uBlock-issues#386

src/js/commands.js

@@ -26,8 +26,21 @@
 /******************************************************************************/
 
 µBlock.canUseShortcuts = vAPI.commands instanceof Object;
-µBlock.canUpdateShortcuts = µBlock.canUseShortcuts &&
- typeof vAPI.commands.update === 'function';
+
+// https://github.com/uBlockOrigin/uBlock-issues/issues/386
+// Firefox 74 and above has complete shotcut assignment user interface.
+µBlock.canUpdateShortcuts =
+ µBlock.canUseShortcuts &&
+ vAPI.webextFlavor.soup.has('firefox') &&
+ typeof vAPI.commands.update === 'function';
+
+if ( µBlock.canUpdateShortcuts ) {
+ self.addEventListener(
+ 'webextFlavor',
+ ( ) => { µBlock.canUpdateShortcuts = vAPI.webextFlavor.major < 74; },
+ { once: true }
+ );
+}
 
 /******************************************************************************/