Login at 53.com fails
Vivaldi 3.4.2066.106 (Stable channel) (64-bit)
Flash 220.127.116.115 /usr/lib/adobe-flashplugin/libpepflashplayer.so
User Agent Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36
Command Line /usr/bin/vivaldi-stable --flag-switches-begin --flag-switches-end --save-page-as-mhtml
the following site worked on old versions, don't remember which one though, doesn't work now:
@smjohn1 What doesn’t work? It’s hard verifying a login problem, because most users won’t have an account. The login site shows as expected.
@luetage Thx. It seems to be caused by cookies. After deleting the cookies associated with the site, login works now.