Font rendering problem in Firefox on Linux

I have this problem of font rendering/smoothing in Firefox on Fedora Linux. The fonts looked somewhat thin and not sharp. Here is the solution
Edit ~/.font.config and make sure it looks like the following

 <?xml version="1.0"?><!DOCTYPE fontconfig SYSTEM "fonts.dtd">  
 <fontconfig>  
  <match target="font">  
  <edit mode="assign" name="rgba">  
   <const>rgb</const>  
  </edit>  
  </match>  
  <match target="font">  
  <edit mode="assign" name="hinting">  
   <bool>true</bool>  
  </edit>  
  </match>  
 <match target="font">  
  <edit mode="assign" name="autohint">  
   <bool>false</bool>  
  </edit>  
  </match>  
  <match target="font">  
  <edit mode="assign" name="hintstyle">  
   <const>hintslight</const>  
  </edit>  
  </match>  
  <match target="font">  
  <edit mode="assign" name="antialias">  
   <bool>true</bool>  
  </edit>  
  </match>  
 </fontconfig>  

How to reset Firefox default address bar search

Firefox, like many other web browsers, has this nice feature that allows you to search upon entering a string in the address bar and hitting enter.
However, sometimes you download an add-on that changes the default search engine.like facemoods or Messenger Plus!
To restore the default search, do the following:

• Open Firefox, and enter the following in the address bar, about:config
• In the page search for (browser.startup.homepage) and right-click it and choose reset
• search for (keyword.URL) right-click, then choose reset

and Enjoy!