@panda Thankfully a #Firefox 2-like UI can still be easily done in a decently modern browser without having to touch userChrome.css! https://addons.palemoon.org/addon/fox-2-the-moon/If you want the ancient add-ons manager UI that opens in its own window there's also this extension: https://addons.palemoon.org/addon/aviary-addons-manager/#PaleMoon