An addon to dim pages.

dimmer promo image
What is dimmer?

'Dimmer' is a Firefox add-on specifically designed to control the brightness of your webpages. Even while in dark mode, certain bright images or videos can strain your eyes. 'Dimmer' combats this by adding a dark overlay to everything on your page, thereby dimming the overall bright elements and ensuring comfortable and safe browsing.

By: mehmetb
Users: 845
Rating: 4.94 (16)
Version: 3.2.0 (Last updated: 2023-11-11)
Creation date: 2020-04-21
Weekly download count: 57
Firefox on Android: No
Risk impact: Moderate risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
Size: 32.90K
Email: me*****@pm.me
URLs: Website
Stats date:

Other platforms

Not available on Chrome
Not available on Edge
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Even if you're using dark mode your eyes can still hurt by bright images/videos. This addon places a dark overlay infront of everything on the page to dim the brightness.

  • Toggle Dim (All tabs): Ctrl + Alt + N (Linux/Windows), ⌘ + ⌥ + N (Mac)
  • Toggle Dim (Active tab only): Ctrl + Alt + B (Linux/Windows), ⌘ + ⌥ + B (Mac)
You can change the shortcuts from about:addons -> Manage Your Extension -> Manage Extension Shortcuts.


  • All tabs When this option is selected, the states will be shared between the tabs that is set to 'All tabs'. If you change the state (dim/undim or change the dim level) of one of the tabs, the change will be applied to all tabs that are set to use 'All tabs' option.
  • This tab only When this option is selected, the tab will have its own state and it will not be affected by other tabs' state changes.
Changing the settings
  • From 'This tab only' to 'All tabs'
See more
User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
  • Easy control of screen brightness
  • Has a keyboard shortcut
  • Helpful for reducing eye strain and reflections
  • Doesn't require access to user data
  • Can be activated only when needed
  • The thumbnail disappears on dark themes
  • The dim button doesn't close the pop-up
  • Doesn't work on pdf's viewed in browser
  • Needs to be activated for each new page
Most mentioned
  • Ease of use
  • Beneficial for people with frequent headaches
  • Helpful for dark theme users
  • Doesn't read user's data
  • Needs reactivation for new pages
View all user reviews
Risk impact

dimmer may not be safe to use and it requires some risky permissions. Exercise caution when installing this add-on. Review carefully before installing.

Risk likelihood

dimmer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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