I prefer
Aardvark, (kudos to
Mark0), rather than Nuke Anything Enhanced - saves a lot of right-click menu work which I find always annoying.
And rather than Findbar Basics, I just remove the find qualifier, (usually '/'), so that when I start typing, (outside a text box), it starts searching, then F3 to repeat as necessary - the Find bar disappears after a few seconds of no entry or just hit Escape.
The add-ons that I have normally installed:
Aardvark - Override compatibility and it still works. Let's you remove whatever you don't want on the page temporarily before printing/saving.
Adblock Plus - Gets rid of ads.
Advanced Dork - Highlight a word and search using Google's advanced operators, eg. intitle, link, movie, etc, etc
BugMeNot - Let's you try and access a site using registration someone else has provided.
CustomizeGoogle - Let's me disappear Google ads except when I don't want to as well as a bit of obfuscation.
Download Statusbar - As per Hirudin's post above.
ErrorZilla Mod - Gives a few more options to a failed page load, (I'll probably replace it with
ErrorZilla Plus).
FireFTP - A really excellent FTP client, saves me opening a DOpus lister
Forecastfox - Saves me from opening the blinds to see if it's raining.
Greasemonkey - Can make websites so much more than what they are. Coupled with
Greasefire to make finding scripts easier.
Linkification - Converts text links into clickable links.
Nightly Tester ToolsNoScript - Stop unwanted script/Flash from executing.
Speed Dial - Quick access to your most visited sites.
Tab Mix Plus - Make Tabs work the way you want. You need to get the latest build from the forum.
TrashMail.net - Create disposable email addresses for websites.