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CBS videos won't play, when others play just fine

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I have updated Flash Player to 13 and Firefox to 28 now CBS videos will not load

I have updated Flash Player to 13 and Firefox to 28 now CBS videos will not load

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Are you using any type of ad blocker?

I have to disable Adblock Plus completely, to view CBS videos. Disabling on "this page only" or on the "CBS domain" doesn't allow a video to play.

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I do not have Ad Blocker or anything else similar installed. I have another computer and can watch CBS on it but something changed on my main computer. I even tried transferring the Mozilla folders from one computer to the other but that did not work. I have written to CBS and they replied a couple of times without resolution and now suggest I load Google Chrome. I do not want to do that. I am not a computer expert but I get around one pretty good (started out in DOS years ago) so this is extremely frustrating.