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Video's won't play

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I am running "Firefox Browser 93.0", and I have Windows 10 Pro Version 21H1, OS Build 19043.1288. I am unable to watch certain video's, as an example, the video in this link: [https://www.wandtv.com/news/illinois-.../article_24b92a86-32c4-11ec-a487-3bb3f17fa133.html] won't play. It use to work, but something has changed, not by me. It will play that same video using the "Edge Browser" so there is nothing wrong with the website. However, I can play this "YouTube Video": [https://www.youtube.com/watch?v=qAJSYk5wMiA] I also tried another link in their website, this is the weather link: [https://www.wandtv.com/weather] it starts to play, but then stops and nothing ever plays. Here is another link I tried on their website: [https://www.wandtv.com/sports/fans-ma.../article_f94f4ade-32e0-11ec-9351-ef71f52b96cd.html] It won't play either. But they all play in the "Edge Browser!" Any ideas on what changed and how do I change it back, so they will play? I prefer Firefox Browser to any other browser! Do you know what the issue could be? I appreciate your time! NiceSeeingYou

Chosen solution

I did as you suggested, (I appreciate all the effort you took to resolve this issue!) I went back to the TV website and still the video's will not play, so I rebooted computer and still the same problem. So I saved my Bookmarks and uninstalled Mozilla Firefox Browser, ran a program called "CCleaner" to delete invalid links in my register and cleared my cache, then went to your website and downloaded and reinstalled Firefox Browser 93.0 and now them video links will open! I rarely come here and ask for help, and "I am very please that you responded so fast", THANK YOU Cor-el! Problem resolved by uninstalling and reinstalling Firefox Browser! NiceSeeingYou

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If you use extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) that can block content (Adblock Plus, NoScript, DuckDuckGo PE, 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 relevant-looking messages about blocked content.


You can try these steps in case of issues with webpages:

You can reload webpage(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 (Settings).

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css 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 Troubleshoot Mode start window

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Chosen Solution

I did as you suggested, (I appreciate all the effort you took to resolve this issue!) I went back to the TV website and still the video's will not play, so I rebooted computer and still the same problem. So I saved my Bookmarks and uninstalled Mozilla Firefox Browser, ran a program called "CCleaner" to delete invalid links in my register and cleared my cache, then went to your website and downloaded and reinstalled Firefox Browser 93.0 and now them video links will open! I rarely come here and ask for help, and "I am very please that you responded so fast", THANK YOU Cor-el! Problem resolved by uninstalling and reinstalling Firefox Browser! NiceSeeingYou

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