Here are two articles from ComputerWorld:
- Hacking Firefox: The secrets of about:config
I liked the two tricks explained over there, which tells you how to size the tab button width, so that more tabs can squeeze into your tab bar (would be useful when number of tabs go into 30's, but then, won't be useful if they are 109-:)), and how to just select a word, and not the whitespace after that
- 15 must-have Firefox tricks
The useful trick was how to build your own search engine, and how to use keywords for searches from websites that don't have search engines for Firefox. I have used that feature, and it certainly helps (e.g, I use a tool called Pin, and whenever I have to search for some API function call in its manual page while I am online, I just have to type 'pin serarch-term' in the address bar, and there you go). The other trick that I use frequently (described in the above article) is to use keywords for opening bookmarked web pages, e.g. I have to just type 'patt' in the address bar, when I actually intend to go to my advisor's home page, http://users.ece.utexas.edu/~patt/ . Useful, haan...
Happy browsing with firefox ...
p.s.: Don't forget to read the comments on these articles, because you could get a useful tip like pressing 'alt+enter' for viewing search results in a new tab, and save yourself from doing complicated things in about:config ...