User-Agent discrimination - Websites blocking some browsers...

Many websites worked perfectly in Vivaldi, but were blocked when not included on the site’s allowed list of leading browsers. ( even if they were Chromium-based ).

https://vivaldi.com/blog/vivaldi-on-android-6-1/

And linked in this link was more about User-Agent discrimination by the developer, Yngve Pettersen about User-Agent discrimination.

https://vivaldi.com/blog/technology/client-hints-or-client-lies/

Continued... (from first link)

To combat this, back in 2019, we were forced to change Vivaldi’s User-Agent strings. The User-Agent contains the web browser’s name, the name of the operating system, and other technical information.