Hey, I just thought I should respond to your post here to mention that addons/extensions are completely fixed in Firefox-ESR 115 with my new extensions_menu.css and dynamic_popups.css (as well as a few different dynamic_popups variations), and my true_mobile_landscape.css (and the alt variation) completely fixes addons/extensions in landscape orientation mode. And all fixes are included in fenix_fox.css and fenix_one.css (and their alt variations).