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Why do empty boxes show up instead of text on many web pages?

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Several months ago we started having trouble on our Mac OS X desktop computer with Firefox. On many web pages, including the Firefox Support home page, I see empty boxes instead of text. The boxes do not have any letters in them. If I copy and paste the boxes into MS Word it translates them into text, but not on the web page.

Several months ago we started having trouble on our Mac OS X desktop computer with Firefox. On many web pages, including the Firefox Support home page, I see empty boxes instead of text. The boxes do not have any letters in them. If I copy and paste the boxes into MS Word it translates them into text, but not on the web page.

Edeziri site na jenmardunc

Asịsa ahọpụtara

You can do a check for corrupted fonts and other font issues:

Gụọ azịza a na nghọta 👍 2

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Asịsa Ahọpụtara

You can do a check for corrupted fonts and other font issues:

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Thanks! I validated/removed fonts using fontbook and downloaded FontNuke. So far all pages I've visited look correct! Thanks, again!