This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

Font issues>Display Incorrectly> Long String of AAAs in Boxes

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

justbcuz73
justbcuz73
more options

Fonts display incorrectly on several sites since I upgraded browser. See attached. I have tried disabling "Use hardware acceleration when available" and turning off extensions with no luck. Don't have problem using Safari.

Fonts display incorrectly on several sites since I upgraded browser. See attached. I have tried disabling "Use hardware acceleration when available" and turning off extensions with no luck. Don't have problem using Safari.

Chosen solution

This can happen when Firefox has a problem to access locally installed fonts because of sandbox security issues.

You can set this pref to 2 or 1 on the about:config page to lower the sandbox security setting.

  • security.sandbox.content.level = 1
  • close and restart Firefox to make the change effective.

If '1' still doesn't have effect then try '0' to disable the sandbox.

If this didn't work then undo/reverse the change and reset the pref via the right-click context menu to the default value.

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

If you also have this problem on the about:config page then try to boot the computer in Safe Mode.

Read this answer in context 👍 1

All Replies (2)

justbcuz73
justbcuz73 Question owner
more options

Here is an image of the screen.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

This can happen when Firefox has a problem to access locally installed fonts because of sandbox security issues.

You can set this pref to 2 or 1 on the about:config page to lower the sandbox security setting.

  • security.sandbox.content.level = 1
  • close and restart Firefox to make the change effective.

If '1' still doesn't have effect then try '0' to disable the sandbox.

If this didn't work then undo/reverse the change and reset the pref via the right-click context menu to the default value.

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

If you also have this problem on the about:config page then try to boot the computer in Safe Mode.