This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Green bar and abnormal colours on youtube

  • 1 reply
  • 1 has this problem
  • 2 views
  • Last reply by Happy112

more options

When I am watching a Youtube clip on youtube or on facebook almost everytime I see a thick green bar in the middle of the clip or at the bottom.

The rest of my renently bought modem pc works perfectly.

What can it be ? How to solve it ?

When I am watching a Youtube clip on youtube or on facebook almost everytime I see a thick green bar in the middle of the clip or at the bottom. The rest of my renently bought modem pc works perfectly. What can it be ? How to solve it ?

All Replies (1)

more options

Hi,

That must be annoying  ! Would you please try this :

Type in the address bar about:config (press Enter) (promise to be careful, if asked)

Type in the search bar and look for the preference :

media.wmf.dxva.d3d11.enabled

and set it's value to false

Then close and restart Firefox.


If the above doesn't do the trick : Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

You will need to restart Firefox for this to take effect so save all work first (e.g., mail you are composing, online documents you're editing, etc.,) and then perform these steps:

In Firefox 55 and above:

  1. Click the menu button New Fx Menu and select Options (Windows) or Preferences (Mac, Linux).
  2. Select the General panel.
  3. Under Performance, uncheck Use recommended performance settings. Additional settings will be displayed.
    Fx55Performance-disableHWA
  4. Uncheck Use hardware acceleration when available.
  5. Close Firefox completely and then restart Firefox to see if the problem persists.

Did this fix your problems? Please report back to us!

If the problem is resolved, you should check for updates for your graphics driver by following the steps mentioned in these Knowledge base articles: