I thought to create some kind of poll, but then so many tools and toolbars came to my mind that I got confused))) Personally I'm using only 2 toolbars with mozilla FF , these are Google toolbar and Search Status (show indexed pages, PageRank, alexa rank, compete rank, backward links, meta tags, keywords etc.). I have no need for others and honestly Google toolbar is also useless because of second one)) So, what do you use and for what purposes?
Well I'm using Firefox with the following plugins: IE Tab InFormEnter Search Status Web Developer Toolbar The InFormEnter is an ultra basic RoboForm clone. Helps cut down the work when filling out site submissions. Search Status has a really nifty feature where it highlights any link using the nofollow tag. Also shows PR and misc other goodies found in other plugins, but I mostly use the nofollow highlighting. Then well, who doesn't use the Web Developer's Toolbar? It's great. I can look at the source code of a site and edit the page on the fly. I can find CSS and HTML errors quickly. Basically just lets me be more creative and edit a page whenever I feel like it. I can even edit Google's homepage to test out the appearance of my title tags from a human perspective.
Im using lots of firefox add-ons and toolbars.. SearchStatus Informenter SEOpen Web Developer add-ons Gspace (for file storage)
SEO Quake (much better than SEO for Firefox) and Search Status. I probably don't even need to be using Search Status since I have Quake...