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How Prevent Firefox Screen Dimmer?

jwill
jwill

The exact version doesn't matter, but I am using Firefox v. 95.0 (64 bit). Earlier, recent versions had the same problem. I am using Ubuntu 20.04.3 LTS.

When I click to select one of many available choices, Firefox often automatically dims the screen. If I stop typing, the screen is slowly returned to its normal, bright state. I can keep working with the dimmed screen, but it is very aggravating and error-prone.

An example is at https://species.wikimedia.org/wiki/Zyras, which gives numerous choice selections. Try quickly selecting and then exitting several nearby choices.

I can speed up the return of brightness by using a shell window to run "xrandr --output HDMI-1 --brightness 1.00; xset s noblank; xset s off; xset -dpms" and then quickly selecting (in my LG Settings/Displays window) "Fractional Scaling" scale OFF (100%) and then ON (100% vs "125% 150% 175% 200%") several (up to 30) times.

HOW DO I COMPLETELY TURN OFF THE FIREFOX SCREEN DIMMER?

The exact version doesn't matter, but I am using Firefox v. 95.0 (64 bit). Earlier, recent versions had the same problem. I am using Ubuntu 20.04.3 LTS. When I click to select one of many available choices, Firefox often automatically dims the screen. If I stop typing, the screen is slowly returned to its normal, bright state. I can keep working with the dimmed screen, but it is very aggravating and error-prone. An example is at https://species.wikimedia.org/wiki/Zyras, which gives numerous choice selections. Try quickly selecting and then exitting several nearby choices. I can speed up the return of brightness by using a shell window to run "xrandr --output HDMI-1 --brightness 1.00; xset s noblank; xset s off; xset -dpms" and then quickly selecting (in my LG Settings/Displays window) "Fractional Scaling" scale OFF (100%) and then ON (100% vs "125% 150% 175% 200%") several (up to 30) times. HOW DO I COMPLETELY TURN OFF THE FIREFOX SCREEN DIMMER?

All Replies (4)

cor-el
cor-el
  • Moderator

You can try Firefox from the official Mozilla server if you currently use a version from the repositories of your Linux distribution to see if it behaves differently.

jwill
jwill Question owner

The Linux version numbers are identical. I don't think a Windows version would run on Ubuntu.

jwill
jwill Question owner

I should add: I don't see HOW a display-dimming could occur unless some Firefox developer has included the dimming code. There would seem to be no reason for such a feature -- so, I suggest that the dimming code be disabled or removed. I don't think I can do this myself . . ..

James (On Leave)
James (On Leave)
  • Top 25 Contributor
  • Moderator

jwill1000000 said
The Linux version numbers are identical. I don't think a Windows version would run on Ubuntu.

He was not suggesting you to use the Windows version of Firefox. Mozilla provides official builds of desktop Firefox for Windows, Mac OS X and Linux (32-bit and 64-bit) as Ubuntu packaged the version you have.

If you went to https://www.mozilla.org/en-US/firefox/all/#product-desktop-release you would likely be served the current Release for 64-bit Linux tarbal.

Just extract the Firefox folder and run the Firefox .sh. Make sure the folder has read/write permissions for the user to get updates as a easy way is to place the Firefox folder in /home/<username/ .. </p>

Modified by James (On Leave)