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When I access Comcast.net from Firefox, the Communcations Center page opens, but does not allow connection to email or voicemail. This is a recent problem. Why? How to fix it?

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Accessing Comcast.net from Firefox, the homepage opens, then the sign-in page, but when I get to the Communications Center page, a blank blue screen comes up. Of course, I cannot get to voicemail or email. I have had problems with Firefox/Comast before, but not for long. This has lasted some weeks. How can I fix it?

Accessing Comcast.net from Firefox, the homepage opens, then the sign-in page, but when I get to the Communications Center page, a blank blue screen comes up. Of course, I cannot get to voicemail or email. I have had problems with Firefox/Comast before, but not for long. This has lasted some weeks. How can I fix it?

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Try clearing your browser cache.

Tools > Clear Recent History... - hit Details and make sure only Cache is selected, then select Everything and hit the Clear Now button.