fix #2286: detect Firefox 138 in Android

src/common/safe-globals.js

@@ -22,7 +22,7 @@ export const { apply: safeApply } = Reflect;
 export const hasOwnProperty = safeApply.call.bind(({}).hasOwnProperty);
 export const safeCall = Object.call.bind(Object.call);
 export const IS_APPLIED = 'isApplied';
-export const IS_FIREFOX = 'contextualIdentities' in chrome;
+export const IS_FIREFOX = 'contextualIdentities' in chrome || 'activityLog' in chrome;
 export const ROUTE_SCRIPTS = '#' + SCRIPTS;
 export const extensionRoot = chrome.runtime.getURL('/');
 export const extensionOrigin = extensionRoot.slice(0, -1);