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.

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

Most web pages are now displaying squares with question marks! Installed Mac OS Catalina several days ago, but this just started yesterday. HELP!

  • 3 replies
  • 1 has this problem
  • 3 views
  • Last reply by cor-el

more options

Most web pages are now displaying squares with question marks! Installed Mac OS Catalina several days ago, but this just started yesterday. HELP! Attaching a screen shot

Most web pages are now displaying squares with question marks! Installed Mac OS Catalina several days ago, but this just started yesterday. HELP! Attaching a screen shot
Attached screenshots

All Replies (3)

more options

Is this with all websites/pages, some, a few?

Type about:preferences#content<enter> in the address bar. Across from fonts and colors, press the Advanced button. On the bottom, turn on Allow Web Sites To Choose Their Own.

Fonts Information - Detected via Flash http://browserspy.dk/fonts-flash.php?detail=1

more options

"Allow web sites to choose their own fonts" was already selected. Still having this issue.

more options

Are you using a Font manager that installs fonts in a non default location ?

This likely means that Firefox isn't able to access the requested font and falls back to a 'last resort' font that shows all glyphs as a '?' or an 'A'.

You can check for sandbox security issues when Firefox has a problem to access fonts installed locally.

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

  • 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.

See also: