Hi, Long Johns! I’m sorry for the inconvenience. Could you check if you have enabled “Change browser theme” in the Dark Reader settings (Dark Reader pop-up → More → All settings → General)? If so, the add-on might not work properly.

If that’s not the case, you may have encountered a bug. I’d appreciate it if you could provide a more detailed description via a GitHub issue or email me at me@easonwong.de.