https://bugs.winehq.org/show_bug.cgi?id=53090
Dugan Chen thedoogster@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |thedoogster@gmail.com
--- Comment #1 from Dugan Chen thedoogster@gmail.com --- I just tried with Roland Cloud Manager 3.0. Which now needs DX11 (meaning DXVK), but that's another story.
If you add it to Steam as a non-Steam game, then clicking Sign In or Sign Up will start up your *native* browser, show you the login page, and then use the native browser to log you into the Windows Roland Cloud manager that's running in WINE.
As for what non-default setup Steam/Proton has done to get links to open in native browsers, it's probably what's below (both links have the same information):
https://askubuntu.com/questions/516307/how-do-i-change-default-wine-browser-...
http://www.webupd8.org/2010/03/how-to-make-wine-open-links-in-your.html