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I used to watch n download YouTube videos on Firefox till ystday. Now, the videos wont play and the download stopped working, while the videos do play on Chrome

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I used to watch and download YouTube videos on Firefox. Since yesterday, videos have stopped loading, and an error message is shown saying videos can't be played. When I click on the download button, a new page pops up (which never used to happen before) which says "Server not found: Firefox can't find the server at r12---sn-h557sne7.googlevideo.com."

I have tried almost all suggestions found in various forums. The problem is not yet rectified. Its irritating.

I used to watch and download YouTube videos on Firefox. Since yesterday, videos have stopped loading, and an error message is shown saying videos can't be played. When I click on the download button, a new page pops up (which never used to happen before) which says "Server not found: Firefox can't find the server at r12---sn-h557sne7.googlevideo.com." I have tried almost all suggestions found in various forums. The problem is not yet rectified. Its irritating.

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You can try these steps in case of issues with web pages:

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • Hold down the Shift key and left-click the Reload button
  • Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • Press "Command + Shift + R" (Mac)

Clear the cache and cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

  • Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
  • Do NOT click the Reset button on the Safe Mode start window