Firefox is using incorrect font, how do i fix it when i cant read even the dialog boxes

i cannot paste a screen shot here. firefox is is using small boxes instead of text, that may be ascii codes.

So Firefox worked normally before the malware cleanup? You might want to reinstall Firefox (without removing the current version) and see whether that corrects it.
First, I recommend backing up your Firefox settings in case something goes wrong. See [https://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information]. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)
Next, download Firefox 5 from http://www.mozilla.com/firefox
Close Firefox and run the installer. Does that fix it?
If not, you might need to create a new Firefox profile to work around some bad settings or corruption.
You can start the profile manager using the method described in this article: [https://support.mozilla.com/kb/Managing+profiles Managing profiles].
After creating the new profile, if Firefox is working again, you can move key settings like bookmarks from your damaged profile to the new profile. See [https://support.mozilla.com/en-US/kb/Recovering+important+data+from+an+old+profile Recovering important data from an old profile].
Any luck?

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