This issue still exists. The cause of the problem is that libreoffice generates a temporary HTML page somewhere under the system-wide /tmp, which contains a bit of javascript that redirects to file:///usr/share/libreoffice/help/index.html. But the firefox snap, being strictly confined, cannot see files under /tmp.
And apparently the reason for this convoluted solution is that xdg-open doesn't support URL parameters with file:// URLs (https://github.com/LibreOffice/core/blob/8cdfd9edce38447a3ab7660a0d534982bd9e69b1/sfx2/source/appl/sfxhelp.cxx#L942). ** Changed in: libreoffice (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1951210 Title: libreoffice help doesn't open in firefox (404 error on file:///tmp/lu417531j7po.tmp/NewHelp0.html) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreoffice/+bug/1951210/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
