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automaticDark - Time-Based Theme Changer

Options page in version 1.3.0

This is a simple Firefox WebExtension that allows you to automatically switch between your themes based on the current time.

Set Firefox to change the UI to a dark theme during the night and change back to a light theme during the day!

Try the extension at https://addons.mozilla.org/en-US/firefox/addon/automatic-dark/

Features

  • Automatically calculate and set sunrise/sunset times based on your location
    • ...or manually set the sunrise and sunset times
    • ...or only change the theme based on the system theme!
  • Choose the daytime theme and nighttime theme to switch between

Notes

  • If you have the privacy.resistFingerprinting flag in about:config set to True, the extension will not be able to detect your timezone (#5). You would need to make an adjustment in your settings to compensate for this.
  • Note that Firefox's Default theme may match the default system themes out of the box (for Windows 10, this is as of 63.0).

Screenshots

Options page in version 1.3.0 Dark-themed options page in version 1.3.0

  • Screenshot of the Options page in version 1.3.0.

Feedback / Contributions

Feedback and pull requests welcome! What do you think? Let me know!