This appears to be a known issue as I found this while searching the internet:
Except it is not fixed or something else is going on or it has returned!
Edit: Why is a colon ilegal in the title of a forum post?
Posted
12/15/17, 7:01 PM
See also:
https://wiki.mozilla.org/Security/Sandbox
grahamperrin
grahamperrin 1 solutions 9 answers
Posted
12/22/17, 9:05 AM
etaoin_shrdlu said
… https://bugzilla.mozilla.org/show_bug.cgi?id=1418240…
Mozilla bug 1412090 - Some Fonts Display as Blank due to content-process sandbox:
> VERIFIED FIXED in Firefox 58
12/15/17, 7:01 PM
See also:
https://wiki.mozilla.org/Security/Sandbox
grahamperrin
grahamperrin 1 solutions 9 answers
Posted
12/22/17, 9:05 AM
etaoin_shrdlu said
… https://bugzilla.mozilla.org/show_bug.cgi?id=1418240…
Mozilla bug 1412090 - Some Fonts Display as Blank due to content-process sandbox:
> VERIFIED FIXED in Firefox 58
Edit: Why is a colon ilegal in the title of a forum post?
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