I've opened a feature request for thunderbird: https://bugzilla.mozilla.org/show_bug.cgi?id=1754682
** Bug watch added: Mozilla Bugzilla #1754682 https://bugzilla.mozilla.org/show_bug.cgi?id=1754682 ** Also affects: firefox via https://bugzilla.mozilla.org/show_bug.cgi?id=1754682 Importance: Unknown Status: Unknown ** Changed in: firefox Importance: Unknown => Undecided ** Changed in: firefox Status: Unknown => New ** Changed in: firefox Remote watch: Mozilla Bugzilla #1754682 => None -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1960421 Title: webcal:// URLs do not open calendar application Status in Mozilla Firefox: New Status in firefox package in Ubuntu: Incomplete Bug description: I have Thunderbird 91.5.0 (64-Bit) installed on Ubuntu 20.04 and use it for calendaring. When clicking on a webcal:// or webcals:// URL in Firefox 96.0 (64-Bit) on Ubuntu 20.04, nothing happens. I expect that Thunderbird opens and asks to subscribe to the calendar. To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1960421/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp