What is WebMynd?  It is all about personalizing your search – with colors.  Ok, now before you think this is some new age hippy thing, hear me out.  This add-on for Firefox will help find and keep track of information from a number of different sources.
What sources does it support?  We have:  YouTube, Wikipedia, Flickr, Twitter, Amazon, Economist, CNN, LinkedIn, TechCrunch, Hacker News, Digg, Reddit, Google Books, Fluther, Delicious, Yahoo! Shopping, Scribd, Backtype, and Youlicit.
The easiest way to explain [...]

Doing the same thing over and over again sucks. Being repetitive sucks. If the Web is all about making my life better, why do I have to keep doing the same things over and over again? DejaClick, an extension for Firefox, looks to end my repetitive ways.
Here is a little more about the extension from the developers:
DejaClick is a web recorder and Super Bookmark utility designed exclusively for Firefox. You can record and bookmark your browser activities, [...]

Do you find yourself doing the same thing over and over again? Do you always have something to say in a certain place, or would you like to test Firefox by setting it to do a number of tasks automatically? If any of this sounds interesting, go and get Selenium IDE.

Selenium IDE is an integrated development environment for Selenium tests. It is implemented as a Firefox extension, and allows you to record, edit, and debug tests. Selenium IDE [...]