Ɣef usiɣzef agi

*Adds a plain brightness slider menu popup icon.
*No background scripts using up resources.
*Few permissions needed.
The above two properties mean that page reloads and changes will clear the brightness. However, it can be immediately re-applied by either clicking the icon or by using the shortcut.

Shortcut: ctrl+shift+L (configure in about:addons -> gear icon -> "Manage Extension Shortcuts").
Use the shortcut, press tab to select the slider, then use left/right arrows to adjust brightness, and then escape to hide the slider.

For a more permanent brightness option, see https://raw.githubusercontent.com/dkameoka/brightness-addon/main/userContent.css

Iwenniten n uneflay

Firefox disallows changes to their sites to prevent abuse/malware, so this and other addons like it will only work outside of these sites.

The brightness CSS filter applied to <html> does not currently apply to backgrounds with the "fixed" property; presumed to be a Firefox bug.

Sezmel tarmit-ik

Tizmilin n tuffɣa n 1.0.1.4

Remove unnecessary scripting permission.
Add shortcut.

Ittwaqdec sɣur