Windows 10 reached EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Why is Firefox rendering fonts all jagged and blocky, w/no anti-aliasing?

  • 4 replies
  • 16 have this problem
  • 254 views
  • Last reply by jaero

jaero
jaero

Running FF 29.01 on Windows 7. You can see the image linked below for a comparison of how browsers should render font and how my browser actually renders font. It is not a magnification issue. I've already installed the Anti-Aliasing Tuner extension. I've added the layout.paint_rects_separately boolean as well.

http://i.imgur.com/6kdcFok.png

Running FF 29.01 on Windows 7. You can see the image linked below for a comparison of how browsers should render font and how my browser actually renders font. It is not a magnification issue. I've already installed the Anti-Aliasing Tuner extension. I've added the layout.paint_rects_separately boolean as well. http://i.imgur.com/6kdcFok.png

Chosen solution

Looks to me like ClearType is disabled. http://www.thewindowsclub.com/disable-font-smoothing-windows

Does this only apply to Firefox? If so did you switch to a different font in Firefox settings?

Read this answer in context 👍 2

All Replies (4)

cor-el
cor-el
  • Moderator

Try to create a new Boolean pref on the about:config page via the right-click context menu with the name layout.paint_rects_separately and set the value to true and leave hardware acceleration enabled.

jaero
jaero Question owner

From OP:

I've added the layout.paint_rects_separately boolean as well.

Another screenshot to illustrate the issue, if that helps:

http://i.imgur.com/SZZIrya.png

Modified by jaero

teleguy
teleguy

Chosen Solution

Looks to me like ClearType is disabled. http://www.thewindowsclub.com/disable-font-smoothing-windows

Does this only apply to Firefox? If so did you switch to a different font in Firefox settings?

jaero
jaero Question owner

That was absolutely it. Thank you.