I am not sure what that is, but certain websites don’t even render responsively in the default browser. The browser application ‘Web Pirate’, available in the Jolla store is noticeably faster and renders websites more accurately than the default browser, which is very slow.
Hi marhaec, you may have looked around since your post and discovered that browser function has been a major issue across the board.
Current state of play seems to be that the new browser is a significant improvement; once the new OS version is out of beta/early access we should all find some joy.
[If I have interpreted the poster’s problem correctly, we should probably move this post or mark as duplicate.]