Mozilla and related tools
First off, you need to get the latest Mozilla build. As an alternative, there are two standalone applications, Mozilla Firebird for browsing and Mozilla Thunderbird for reading mail.
Major apps
Firefox plugins and extensions
- Yahoo toolbar
- Everybody needs a Grease Monkey, and maybe a Platypus
- Venkman JS debugger
- Another debugger is FireBug.
- LiveHTTPHeaders
- Online validation services through Checky
- Web Developer
- Reveal, basically Expose for your Firefox.
- Another great tool for web developers (Aardvark)
- PrefBar
- GoogleBar
- AdBlock
- Bookmark Synchronizer
- ChatZilla
- Tabbed browsing prefs
- FasterFox making performance tuning your browser easier
- FormFox makes it easy to see where the Submit form will go.
- Leak Monitor, to help debugging various JS related memory leak issues.
Greasemonkey scripts
- ...
Thunderbird extensions
- Quick File
- Display the senders mail application aka Mail User Agent
- Use Virtual Identity for better control of your From: addresses.