@ mscha
I use both FF and Vivaldi. I've settled on FF for most browsing although I use Vivaldi judiciously on one machine. Vivaldi has to wait for Google to patch security flaws before Vivaldi can update theirs because Vivaldi uses the Google browser engine which - to me - could be presenting a time lag which might be a windows of opportunity for hackers. But I do use it on one computer, I just don't go all over the web with it
But Vivaldi is a lovely piece of software that is so customizable, and a pleasure to use.
Firefox is my workhorse though. And I enjoy using it. It's simpler and cleaner than Vivaldi but in some ways not as customizable in layout and visually.
You indicate you are concerned about your legacy plug-ins. Well, there are and will be many non-legacy plugins to explore, ones that may just do the trick(s) you want them to do.
Anyway ..
Biting the hand that feeds IT
