We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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

when going to fullscreen, on some videoplayers, only the top left 1/4 is shown. The other 3/4 is black.

  • 1 odgovor
  • 1 ima ovaj problem
  • 6 views
  • Posljednji odgovor poslao guigs

more options

The video played at the following url plays fine when not fullscreen. When full screen is selected the image attached is what I view. This happens on other video players, not including YouTube.

http://sourcefed.com/ufc-fighter-josh-neers-troll-confrontation-gets-a-little-harsh/

The video played at the following url plays fine when not fullscreen. When full screen is selected the image attached is what I view. This happens on other video players, not including YouTube. http://sourcefed.com/ufc-fighter-josh-neers-troll-confrontation-gets-a-little-harsh/

All Replies (1)

more options

Hello,

Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.

You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).

Then perform these steps:

  1. Open Firefox Options window (Preferences on Mac or Linux) as follows:
    • In Firefox 29.0 and above, click the menu button New Fx Menu and select Options for Windows or Preferences on Mac or Linux.
    • In Firefox 28.0 and previous versions, click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
  2. In the Firefox Options (or Preferences) window, click the Advanced tab, then select General.
  3. In the settings list, you should find the Use hardware acceleration when available checkbox. Uncheck this checkbox.
  4. Now, restart Firefox and see if the problems persist.

Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:

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

Thank you.