https://bugs.winehq.org/show_bug.cgi?id=52206
--- Comment #7 from Nikolay Sivov bunglehead@gmail.com --- It works fine for me, for winecfg link:
0108:trace:winebrowser:wmain opening L"https://www.winehq.org/" 0108:trace:winebrowser:launch_app Trying "/usr/bin/open" "https://www.winehq.org/"
That opens browser window. On Debian the links are /usr/bin/open -> /etc/alternatives/open -> /usr/bin/xdg-open.