Toggley by Farid Zelli

A simple button that toggles between Light and Dark themes.
To use it, simply tap or click on the icon to switch themes.

• Toggley works best with Dark Reader
• The default keyboard shortcut is Ctrl+Shift+0
• See Manage extension shortcuts in Firefox for more info

Experiencing a problem? Make sure that:
1. Website appearance is set to "Automatic" in settings
2. privacy.resistFingerprinting is set to "false" in about:config
3. "Use system color scheme" and "Detect dark theme" are enabled in Dark Reader

This lightweight add-on is fully open-source.