What are some essential Firefox addons?
I came across a Firefox addon the other day and thought "Damn . . . I wish I would've come across that ages ago. It would've proven to be useful many times" (In case you're curious, the addon I came across was Copy Link Text
). I find that this happens quite regularly which makes me think that there must be loads of addons out there that I could find to be useful.
I already use tons of Firefox addons, but find most of them to be essential; I couldn't live with 95% of them. In fact, I had much, much
difficulty switching to Firefox 4.0. This is because I was forced to live without some of the addons that came to love. I was lucky enough to discover adequate alternatives for some of the old addons I loved which discontinued development, but couldn't find some for quite a few.
About a year ago I spent hours browsing through the addons on the Mozilla site and ended up discovering a handful of useful addons, but haven't bothered browsing the site much since then. So I'm going to rely on you fellow MetaFilter users to recommend great addons you've come to love.
One thing I should add is that if you recommend addons, please try to recommend ones that are compatible with Firefox 4.0+. Also feel free to recommend Greasemonkey and Stylish scripts.