Trailers do not play

I can watch videos on youtube, netflix and various other sites, but when I go to the movie sites and try to watch movie trailers, that they do not appear, they are empty, and this has happened on a few other sites as well. I tried to disable each plugin and extension and get the same thing. If I reboot in safe mode, everything works fine and I can even activate my plugins, but as soon as I reboot in normal mode, it stops working again. I don't know why this is happening and I have to short of ideas on how to get this to work. I've also updated every plugin and media player. Some of the sites that give me problems are the redbox and yahoo movies to name two common sites. Any help will be appreciated.

If that doesn't work in Firefox Safe mode then disable all extensions (Tools > Modules > Extensions) and then try to find out who is causing by allowing an extension at a time until the problem reappears.

Close and restart Firefox after each change through "file > exit ' (Mac: ' Firefox > leave";) Linux: "file > exit ')

Try disabling hardware acceleration in Firefox.

Tags: Firefox

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