It happened this afternoon, and I've tried to system restore and reinstall the Firefox, but the problem still persist until now. Anyone had encountered this problem before? Bold and large fonts everywhere!

Just now my default font for notepade(Lucida Console) is missing, so I copied from my bro's comp and paste it in my font folder, settled, problem solved.

But what the heck happened to my Firefox??

I'm running on Firefox 3.0.4

can u confirm this does not happen with internet explorer. if still persist, maybe your fonts folder has missing some more fonts.

if not, maybe it's just a messed up settings in ffox

my Opera and Safari also affected by this prob.. Font folder problem eh?

Ermm.... attacked my virus?

if large font , just mark any words , and press CTRL and -

i'm having the same problem too. tried CTRL - but still not working..

Try holding ctrl button + scroll down with your mouse

i encountered the same problem too and it also affect the fonts in Computer,AutoRun,CCleaner and etc. This prob showed up after i run the disk check. So my solution is re-format the computer..it settles the prob but it takes time...

font folder i think rosak edi..can try replace whole font folder by copying from another pc..
no choice juz reformat loh..

I think u zoomed everything by accident... try ctrl+scroll

yup bro..
i think u zooming it..
try CTRL + scroll forward n backward c any different?

Tools --> Options --> Content --> Fonts and Colors

Specify which font and how large.

What sort of extensions do you have? Some of them (like Ubiquity) can mess up your fonts.

What's the point of digging up this old thread?