Rated 4 out of 5 stars

After using Dark Reader in Chrome, Vivaldi and Firefox long-term, it's great seeing it available in Thunderbird.

I've discovered one minor issue in linux (it's not present in Windows 11). When Thunderbird is launched, the preview pane is a blinding white until a message is selected. If I don't have new messages, I don't tend to select a message, so the white background remains. Black would be easier on the eyes.

This review is for a previous version of the add-on (4.9.39).