If your Firefox's Drop down menus are missing, this vid can help U out.
Method 1: Start your Firefox in its Safe Mode by holding down the Shift key, and then starting Firefox.
If you're running a Mac computer, press the Options instead.
Method 2: try creating a new profile for your Firefox 1. Inside Firefox, visit the below location@ about:profiles. 2. Click the Create a New Profile button and follow the on-screen wizards to complete the creation process. 3. After creating the profile, scroll down to it and click the "Set as default profile" button below that profile, then scroll back up and click the Restart normally button. Please close Firefox completely and check if any new issues occur. For advanced users, you may edit the "about:config" page this way: disable browser.tabs.remote.autostart.2, If you are using e10s. Note: the exact name of the said preference may vary, but it will start with browser.tabs.remote.autostart
Method 3: Do a clean uninstall of Firefox. 1. back up your personal data like bookmarks. In addtion, you head to Help -> Troubleshooting Information -> Show Folder to open your systems file manager at the current profile, and then copy/paste that directory somewhere safe. 2. Try the recommended uninstall tool PRO in this video guide. 3. get or choose an offline setup file@ www.mozilla.org/en-US/firefox/all/ that works for your computer.