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installed new version, now all the fonts show up as boxed ????? how do I fix?

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all the copy shows up as boxed question marks

all the copy shows up as boxed question marks
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  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:71.0) Gecko/20100101 Firefox/71.0

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FredMcD
  • Top 10 Contributor
4341 solutions 61065 answers

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

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
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cor-el
  • Top 10 Contributor
  • Moderator
17774 solutions 160763 answers

This usually happens if you use third-party font managers that store their fonts is a not standard location. Firefox on Mac uses a rather restricted sandbox and blocks access to most of the file system and thus blocks access to the font file if the font isn't in a standard system location. 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 right-click and select "Inspect Element" to open the builtin Inspector with this element selected.

You can check in the Rules tab in the right panel in the Inspector what font-family is used for selected text. You can check in the Font tab in the right panel in the Inspector what font is actually used because Firefox might be using a different font than specified by the website.


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:

This usually happens if you use third-party font managers that store their fonts is a not standard location. Firefox on Mac uses a rather restricted sandbox and blocks access to most of the file system and thus blocks access to the font file if the font isn't in a standard system location. 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 right-click and select "Inspect Element" to open the builtin Inspector with this element selected. *https://developer.mozilla.org/en-US/Tools/Page_Inspector/How_to/Examine_and_edit_HTML You can check in the <b>Rules</b> tab in the right panel in the Inspector what font-family is used for selected text. You can check in the <b>Font</b> tab in the right panel in the Inspector what font is actually used because Firefox might be using a different font than specified by the website. *https://developer.mozilla.org/en-US/Tools/Page_Inspector/How_to/Edit_fonts ---- You can check for sandbox security issues when Firefox has a problem to access fonts installed locally. *https://wiki.mozilla.org/Security/Sandbox You can set this pref to 2 or 1 on the <b>about:config</b> 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 <b>about:config</b> page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue. *https://support.mozilla.org/en-US/kb/about-config-editor-firefox See also: *https://wiki.mozilla.org/Security/Sandbox#Content_Levels
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