https://support.mozilla.org/en-US/kb/extensions-button

A major user interface overhaul is coming soon! In the meantime, the current UI already allows you to exclude sites from being darkened. If you don’t see the extension’s button pinned in your toolbar, it might still be hidden under the puzzle piece (🧩) menu, where newly installed extensions are grouped

This setting is now available

Each permission in UltimaDark is added only when absolutely necessary and is used in the most minimal way possible. Browsing history and cookies remains untouched. Clearing the cache is done on key moments (such as updating settings ) specifically to prevent loading unedited resources, ensuring consistent dark mode application across websites.

While UltimaDark might perform better than other tools, such as Dark Reader, on certain websites (e.g., telegraaf.nl), it’s worth noting that Dark Reader is developed by a team of over 40 developers and more than 1300 contributors, whereas UltimaDark is free and still the result of a solo effort.

Thank you for your report ! One year of updates since your review might be worth a retry

The extension is still experimental and constantly evolving. To report bugs, share ideas, or track progress, the project’s GitHub page is available. Anyone who wants to be part of the growing community around this project is warmly welcome. Thank you for your patience and support!

Thank you for bringing this to our attention. The issue affecting these sites was caused by an update aimed at enhancing the support for more websites. It was an unintended mistake, not a fundamental bug. We’re addressing it, and a fix has been released in version 1.6.6. If you encounter any further issues, please report them here: https://github.com/ThomazPom/Moz-Ext-UltimaDark/issues