I released the debug build to stable/uri-debug. You can switch to it with snap refresh --channel stable/uri-debug thunderbird
My own debug attempts show that any URI missing the scheme will fail to identify the scheme and port number and therefore fail with NS_ERROR_MALFORMED_URI. For instance, >google.com:553< will error and this is the debug log: console.log: "URI in getURI: google.com:553" console.log: "URI scheme: google.com" console.log: "URI port: -1" Whereas >https://google.com:55< will raise no exception and the debug log says: console.log: "URI in getURI: google.com:55" console.log: "URI scheme: https" console.log: "URI port: 55" HOWEVER, other valid URIs (such as >imap://google.com:55<) will fail with no debug log output but with this error: JavaScript error: resource://gre/modules/URIFixup.sys.mjs, line 985: NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIIOService.newURI] I also tried >ftp://google.com:55< just for the hell of it, and that was very interesting, as it caused a "open the ftp link with System Handler" window to pop up (screen-shot attached). So maybe the portal is wreaking some havoc here. Bottom line for now is: Try only http or https: schemes, even if you are specifiying 993 or 995 (or whatever) port. ** Changed in: thunderbird (Ubuntu) Status: Confirmed => In Progress ** Changed in: thunderbird (Ubuntu) Assignee: (unassigned) => Nathan Teodosio (nteodosio) ** Attachment added: "2025-10-23-190514_1920x1200_scrot.png" https://bugs.launchpad.net/bugs/1904789/+attachment/5920024/+files/2025-10-23-190514_1920x1200_scrot.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1904789 Title: [snap] Cannot confirm security exception for invalid certificate To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1904789/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
