Well,..this is crazy, but it works. I installed an earlier version of FireFox,...and then was able to download and install all the addons I liked, from the official Mozilla site. Now I will try to upgrade FF to the latest version ...and see if my addons will still be there. Interesting, eh? And I was just getting to like Opera. And I had downloaded the web browser "Epiphany",...and even though it doesn't come with flash installed,...I find that I actually like it for it's speed (and it offers a little more than Dillo does).
Gee, Vector is fun to play with,......(works for serious stuff too, though).