Though I’d share my favorite “must have” firefox plug-ins for whitehatting / blackhatting…whatever.
1. SeoQuake – Seoquake allows to obtain and investigate many important SEO parameters of the internet
2. iMacros – Automate Firefox. Record and replay repetitious work. Repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords
3. RelaodEvery – Reloads web pages every so many seconds or minutes.
4. NoScript - Allow active content to run only from sites you trust, and protect yourself against XSS and Clickjacking attacks (blocks unsafe advertising scripts and code)
5. ProxySwitch – With just one click switch your proxy ON/OFF.
6. NoDoFollow – simple extension to highlight links in a page according to nofollow / dofollow status. (Was great for manually finding dofollow blogs and forums