HI, could you please edit out identifiable info. Thank You.

Sorry I see no difference what so ever in the video in Seamonkey, Edge or Firefox.

On what page on the website can we see this MP4 video?

You can try to disable hardware acceleration in Firefox.

• Options/Preferences -> General: Performance
  remove checkmark: [ ] "Use recommended performance settings"
  remove checkmark: [ ] "Use hardware acceleration when available"
• https://support.mozilla.org/en-US/kb/performance-settings

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

• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

You can check if there is an update for your graphics display driver and check for hardware acceleration related issues.

• https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

@cor-el I turned of the performance settings and the hardware acceleration, still have the same problem.

I've added a screenshot for comparison.

Try to set the gfx.color_management.mode pref to 0 (zero) on the about:config page to disable Color Management.

You need to close and restart Firefox to make the change effective. See:

• http://kb.mozillazine.org/gfx.color_management.mode

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

• http://kb.mozillazine.org/about:config

@cor-el I turned the color management mode to 0, still no effect I'm afraid.

Hi, do you have a transparent mask in your video?

smorele said

Hi, do you have a transparent mask in your video?

At the moment I do not, I have been looking at examples that use a mask, it could be an option,

Solution: We ended up running our video through http://www.videosmaller.com/ which strips the video of its colorprofile.