Do fonts look blurry to you in Firefox 5? Some users have been reporting issues with fonts looking blurry in Firefox since version 4. Here are a couple of things you can try to improve the quality of font rendering.
Turn on ClearType in Windows Vista/Windows 7
Step 1: Click the Start button, then enter "cleartype" in the "Search programs and files" box and select "Adjust ClearType text."
Step 2: Make sure that the check box for "Turn on ClearType" is checked and click Next to go through the ClearType tuner.
If successful, you should notice a subtle improvement in the quality of the text.
Turn off hardware acceleration in Firefox:
Step 1: Click the orange Firefox button in the upper left corner, then select Options from the second column.
Step 2: Go to Advanced Options, then in the General tab uncheck the box next to "Use hardware acceleration when available."
Again, you should notice a subtle improvement in the quality of the text. Turning off hardware acceleration will degrade Firefox's overall performance, but if you prefer the quality of the text with acceleration off, you may find it's worth it.
There you have it: if you're having trouble with blurry fonts in Firefox 5, one of these solutions may work for you.