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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Video brightness changes when moving browser window to other display

  • 2 replies
  • 1 has this problem
  • 2 views
  • Last reply by Donlod

Donlod
Donlod
more options

When moving the browsers window in which a video is playing to the second display, the videos brightness or gamma changes. This results in a too bright video on my second display. When moving it back to the first display it changes back (to normal). If the video is paused it does not change brightness. But as soon as you resume it the brightness changes. Only the brightness of the video changes not of the whole site. This happens only if using a HTML5 video player. When using flash it does not happen. This happens only in firefox, other browser do not behave like this. I noticed this first after the firefox update to 55.0.3 which was today. Im using win10 pro as OS.

When moving the browsers window in which a video is playing to the second display, the videos brightness or gamma changes. This results in a too bright video on my second display. When moving it back to the first display it changes back (to normal). If the video is paused it does not change brightness. But as soon as you resume it the brightness changes. Only the brightness of the video changes not of the whole site. This happens only if using a HTML5 video player. When using flash it does not happen. This happens only in firefox, other browser do not behave like this. I noticed this first after the firefox update to 55.0.3 which was today. Im using win10 pro as OS.

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You can try to disable hardware acceleration in Firefox.

  • Options/Preferences -> General: Performance
    remove checkmark: [ ] "Use recommended performance settings"
    "Use hardware acceleration when available"

You need to close and restart Firefox after toggling this setting.

Donlod
Donlod Question owner
more options

cor-el said

You can try to disable hardware acceleration in Firefox.
  • Options/Preferences -> General: Performance
    remove checkmark: [ ] "Use recommended performance settings"
    "Use hardware acceleration when available"
You need to close and restart Firefox after toggling this setting.

This fixed it. Ill try updating graphics drivers as mentioned in the links you posted and report if it helped.

Modified by Donlod