BetterViewer replaces the built-in image viewing mode in Firefox and Chrome-based browsers.
Open source
24 alternativesDarkreader
Dark Reader is an open-source MIT-licensed browser extension for Chrome and Firefox that analyzes web pages and generates a dark mode to reduce eyestrain.
About Darkreader
Dark Reader is an open-source, MIT-licensed browser extension for Chrome and Firefox. It analyzes web pages and generates a dark mode meant to reduce eyestrain while browsing. Its source code is hosted on GitHub. A JavaScript API also lets website owners enable dark mode on their own sites.
Pricing is not clearly stated.
Key features
- Brightness, contrast and sepia options in the API
- Customizable settings in the extension UI
- Package installable from NPM or a CDN
Best for: Users who want dark mode on web pages in Chrome or Firefox, and developers who want to use its API or contribute to the project.
Watch out for
- Building from source needs Node.js or Deno, and Deno support is experimental.
Darkreader at a glance
- Category
- Software & Utilities › Firefox Extensions
- Type
- App
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension
- Details verified
- Oct 21, 2026 · Official source
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Open source
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