I've just installed Firefox 79.0.1 on Manjaro and the add-on shortcuts that normally appear to the right of the address bar are missing. Even when selecting "Customize", there are no icons/shortcuts for my installed add-ons. I tried selecting "Restore Defaults" on the customize page but the add-on shortcuts are still missing. I also have tried uninstalling and reinstalling the add-ons and reintalling firefox itself multiple times. This is particularly frustrating because one of my add-ons is a password manager and without the shortcut I have to manually enter all my passwords. =(