My current excuse? Android (the only current realistic alternative; I don't have the time nor care to fiddle with technical details on a device that I need to be a reliable tool. I'm not afraid of going deep on something less standard, Linux has been my daily driven OS for literally decades) is trash and untrustworthy in my experience. Browser extensions alone are not nearly enough to tip the scale for me to go back to it. As mentioned I use something that provides extension support already (from a browser that has far fewer developers working on it!), which is why I find it stupid that Mozilla won't figure out a way to do it themselves.