Users report that a YouTube code causes Firefox to take 5 seconds longer to load a video than Chrome - Gearrice
Updated] YouTube videos not loading for some Firefox users
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I use mozilla firefox as my main web browser, and youtube sometimes does sometimes doesn't load (picture below). This happens only on firefox, every other website works fine tho. : r/youtube
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The page of the youtube high definition firefox addon... : r/FrutigerAero
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Firefox】YouTubeを常に好みの設定にする「YouTube High Definition」 | ハルパス