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Most Videos aren't playing in Firefox - Netflix, Prime Video, Plex, IMDB trailers, etc....

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Most Videos aren't playing in Firefox - Netflix, Prime Video, Plex, etc....

YouTube is still working and it's hit and miss with other sources (mostly miss).

I have FireFox 79 and it's been updated for sometime before this started happening. I've not added any addons or plugins recently and my OS (Windows 10) hasn't updated lately.

Netflix Error: Error Code: F7355 IMDB Error: Error Code: 102630

Most Videos aren't playing in Firefox - Netflix, Prime Video, Plex, etc.... YouTube is still working and it's hit and miss with other sources (mostly miss). I have FireFox 79 and it's been updated for sometime before this started happening. I've not added any addons or plugins recently and my OS (Windows 10) hasn't updated lately. Netflix Error: Error Code: F7355 IMDB Error: Error Code: 102630

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Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

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There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connection certificates and send their own.

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can

https://support.mozilla.org/en-US/kb/firefox-and-other-browsers-cant-load-websites

https://support.mozilla.org/en-US/kb/secure-connection-failed-error-message

https://support.mozilla.org/en-US/kb/connection-untrusted-error-message

Websites don't load - troubleshoot and fix error messages

http://kb.mozillazine.org/Error_loading_websites

What do the security warning codes mean

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FredMcD said

Make sure you are not blocking content. Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

https://support.mozilla.org/en-US/kb/enhanced-tracking-protection-firefox-desktop

Yes the error is still there after restarting in safe mode. I had actually tried that already but tried again just in case.

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Are you possibly using Private Browsing mode ?


If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, Disconnect, Ghostery, Privacy Badger, uBlock Origin) always make sure such extensions do not block content.

Firefox shows a purple shield instead of a gray shield at the left end of the location/address bar in case Enhanced Tracking Protection is blocking content. You can click shield icon for more detail and possibly disable the protection. You can check the Web Console for messages about blocked content.

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 remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Options/Preferences).

"Remove the Cookies" for websites that cause problems:

  • Options/Preferences -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Options/Preferences -> Privacy & Security
    Cookies and Site Data -> Clear Data -> Cached Web Content: Clear

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window