How to fix fonts in Firefox Windows 7
Solution 1:
Seems like I found an answer to my own question. After long research I finally found a solution in this site: http://www.ghacks.net/2011/03/23/blurry-fonts-in-firefox-try-anti-aliasing-tuner/
I did not use the Anti Aliasing Tuner though, what I did was simply disable Hardware acceleration.
I hope this helps someone in the future.