Forum communautaire Firefox

What version of Firefox actually allows you to add extensions? I'm running the most current version of Tumbleweed that ships with 144.0. Attempts to add extensions just sit there doing nothing until I close the tab. This sort of worked some time ago (I forget the version) but the inability of Firefox to allow add-ons/extensions is getting to be a joke. There are other browsers out there, ya know.

I am using Kubuntu 25.04. I tried support but the support in Firefox doesn't seem to have much help for OSes beyond Windows even though they make a native Linux version. I subscribe to several extensions and use Firefox sync to get the extensions onto a new computer but they don't automatically pin to the menu bar. I figured out how to do that once but I forgot how I did that and can't find it in help. Can someone please tell me how to do that. Mozilla, if you are reading this you might want to improve the support in your Linux version.

Dear Firefox, My mouse is not doing the usual function. The right click is giving me different options like translate the word I highlighted or search the meaning. I just need the right click to copy. How did it even changed without my knowledge. Thank you, Alice