Vivaldi 6.6 has been released with lots of new features. One notable feature forces web pages to follow your browser theme. If you have Dark Reader installed, you may no longer need it.
Vivaldi mail RSS
Vivaldi web browser's latest version comes with an email client integrated with a calendar and feed reader. The Mail 1.0 platform has its own way to organize emails and sort them into "Views".
The latest Vivaldi snapshot has arrived with Vivaldi Mail, Vivaldi Feed Reader, and Vivaldi Calendar. The features are still in technical preview so users will need to manually enable them.