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Preview of Dark Background Anti-Flash

Dark Background Anti-Flash by David

Dark Background Anti-Flash reduces sudden white flashes on bright pages by using a temporary dark overlay that fades out smoothly. We also have optional CSS background darkening to force dark theme on pages that do not have it.

Available on Firefox for Android™
4.3 (3 reviews)
7 Users
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About this extension
  1. Install add-on on Firefox desktop.
  2. Open a new tab and confirm dark background.
  3. Open a bright website (for example a white-background page) and confirm dark preload + smooth transition.
  4. In Options, enable bright-site override and set custom color; reload the same site and confirm override.
  5. Add a hostname to “Always force custom color” and confirm it always uses the custom color.
  6. Add a hostname to exclusions and confirm the add-on skips that site.
Rated 4.3 by 3 reviewers

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Permissions and data

Required permissions:

  • Access your data for all websites

Optional permissions:

  • Access your data for all websites

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
Version
1.2.0
Size
31.73 KB
Last updated
13 days ago (Jun 27, 2026)
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