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 ( I this this on is a must have for SEO.) 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 / ******** status. (Was great for manually finding ******** blogs and forums. Feel free to post your favorites? and maybe even how you use them to do what you do?!