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Drops or blocks phone numbers on many web pages

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When on phone number is shown for a commercial website, it either appears momenatrely or is blocked completely. Fax phone numbers are shown but not standard voice phone numbers.

When on phone number is shown for a commercial website, it either appears momenatrely or is blocked completely. Fax phone numbers are shown but not standard voice phone numbers.

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The Skype extension for Firefox has been known to cause that type of problem. Disable that extension if you have it.

http://kb.mozillazine.org/Problematic_extensions