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HD video on FireFox

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FireFox tells me that I do not have the latest hd video (plugin) . When I click on download, Avast pops up (I do not use Avast) and it says "download. How can I get the latest hd video plugin for FF . I am having problems viewing some videos. Thank you for any advice.

FireFox tells me that I do not have the latest hd video (plugin) . When I click on download, Avast pops up (I do not use Avast) and it says "download. How can I get the latest hd video plugin for FF . I am having problems viewing some videos. Thank you for any advice.

Chosen solution

This is all very suspicious. I wouldn't install anything from that website.

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Chosen Solution

This is all very suspicious. I wouldn't install anything from that website.

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Thank you. I appreciate your reply.