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Recently, I am being blocked from watching You Tube videos. There's a message saying that I have an ad-blocker. The message flashes on the screen and disappears almost immediately, so I am unable to read the details of the message. Then I went to another website and I received a similar message. This time, the message stayed on the screen, and I was able to read it all. It said that I have to go to my "extension bar" and disable the ad blocker. What is an extension bar, and does this have something to do with Mozilla Firefox? Firefox recently had an update, so I am wondering if they are related.

Recently, I am being blocked from watching You Tube videos. There's a message saying that I have an ad-blocker. The message flashes on the screen and disappears almost immediately, so I am unable to read the details of the message. Then I went to another website and I received a similar message. This time, the message stayed on the screen, and I was able to read it all. It said that I have to go to my "extension bar" and disable the ad blocker. What is an extension bar, and does this have something to do with Mozilla Firefox? Firefox recently had an update, so I am wondering if they are related.

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Sorry for my previous reply, wrong thread.

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.

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You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.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), click the padlock icon (Clear cookies and site data) for the domain in the selected tab.

"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 if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click "Refresh Firefox" in the Troubleshoot Mode start window

You can check for issues with Enhanced Tracking Protection. 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.

  • click the shield icon for more detail and possibly disable the protection

You can check the Web Console for relevant-looking messages like about blocked content.

Helpful?

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