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Why is some text appearing as the letter A in a box?

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

gerrygmg
gerrygmg
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I already have the option checked to let the sites select their own font.

I already have the option checked to let the sites select their own font.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
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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.