The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: This will cause you to lose any Extensions, Open websites, and some Preferences.

To Reset Firefox do the following:

1. Go to Firefox > Help > Troubleshooting Information.
2. Click the "Reset Firefox" button.
3. Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
4. Firefox will open with all factory defaults applied.

Further information can be found in the Refresh Firefox - reset add-ons and settings article.

Did this fix your problems? Please report back to us!

Thanks for the help.

Can you attach a screenshot and post a link?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.

Try to set the gfx.content.azure.enabled pref to false.

Hi cor-el,

I've recently moved from Win xp to Win 7 and installed it on a new computer (and a new monitor).

I'm having some issues with blurry fonts. With Clear Type on the text is hardly readable.

On this page, and I hope you could see it in the attached screenshot, the big letters (esspacially W, O, P) are really fuzzy.

I appreciate your help.

Did you try to disable hardware acceleration to see if that helps?

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Are there any error messages or warnings in the Graphics section on the Help > Troubleshooting Information page?

• https://support.mozilla.org/kb/Using+the+Troubleshooting+Information+page

Thanks a lot.

Disabling hardware acceleration didn't help.

I coudn't find anything wrong in the Troubleshooting Information page. I'd really appreciate it if you could take a look at the attached screenshots.

That Troubleshooting page is OK.

Which font is used for that text?

You can use this extension to see which fonts are used for text that is selected (right-click context menu: Show fonts in selection).

• fontinfo: https://addons.mozilla.org/firefox/addon/fontinfo/

You can do a font test to see if you can identify corrupted or otherwise malfunctioning font(s).

• http://browserspy.dk/fonts-flash.php?detail=1

You can try different default fonts and temporarily disable website fonts to test the selected default font.

• Tools > Options > Content : Fonts & Colors > Advanced
• [ ] "Allow pages to choose their own fonts, instead of my selections above"

That's great. You do know a lot! :) Thanks.

The font used is: Open Sans Regular, and I don't have it installed. If I force Fx to use another font the page is displayed correctly.

Why does Fx display the page (this forum) in Open Sans Regular? Is there a way to solve it without using a fixed font? Looking at the list of fonts (in http://browserspy.dk/fonts-flash.php?detail=1) the only apparently malfunctioning one is the Segoe UI. I've read about this font in the last couple of days. It seems I have some problem in Win 7. Any Idea?

Best regards.

Firefox will download the Open Sans font automatically from the Mozilla server via an @font-face rule in a linked CSS file.

• https://support.cdn.mozilla.net/media/css/common-min.css?build=323f02f

@font-face{
font-family:'Open Sans';
src:url('//www.mozilla.org/media/fonts/OpenSans-Regular-webfont.woff') format('woff')
}

Thanks again.

I didn't quite understand the steps I should take. Could you please elaborate?