Package: thunderbird Version: 1:68.8.0-1~deb10u1 Severity: minor When running Thunderbird under Xfce with /etc/apparmor.d/usr.bin.thunderbird enabled, Thunderbird always opens URLs with sensible-browser, even if that is not the "preferred browser" selected in Xfce's "Preferred Applications" settings panel (exo-preferred-applications). After `aa-disable /usr/bin/thunderbird`, Thunderbird henceforth opens URLs in the right browser.
I suspect this is because the AppArmor profile prohibits exo-open (when spawned by Thunderbird) from reading ~/.config/xfce4/helpers.rc, which apparently is where Xfce keeps the user's application selections. When apparmor is enabled, opening a URL gives me this on Thunderbird's stderr: > (exo-helper-1:2307): libxfce4util-CRITICAL **: 17:43:07.428: Failed to parse > file /home/gnoutchd/.config/xfce4/helpers.rc, ignoring. And I get this in the journal: > May 12 17:43:07 tbirdtest audit[2307]: AVC apparmor="DENIED" operation="open" > profile="thunderbird" name="/home/gnoutchd/.config/xfce4/helpers.rc" pid=2307 > comm="exo-helper-1" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 > May 12 17:43:07 tbirdtest kernel: audit: type=1400 audit(1589319787.417:43): > apparmor="DENIED" operation="open" profile="thunderbird" > name="/home/gnoutchd/.config/xfce4/helpers.rc" pid=2307 comm="exo-helper-1" > requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 -- System Information: Debian Release: 10.4 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 4.19.0-9-amd64 (SMP w/2 CPU cores) Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages thunderbird depends on: ii debianutils 4.8.6.1 ii fontconfig 2.13.1-2 ii libatk1.0-0 2.30.0-2 ii libc6 2.28-10 ii libcairo-gobject2 1.16.0-4 ii libcairo2 1.16.0-4 ii libdbus-1-3 1.12.16-1 ii libdbus-glib-1-2 0.110-4 ii libevent-2.1-6 2.1.8-stable-4 ii libffi6 3.2.1-9 ii libfontconfig1 2.13.1-2 ii libfreetype6 2.9.1-3+deb10u1 ii libgcc1 1:8.3.0-6 ii libgdk-pixbuf2.0-0 2.38.1+dfsg-1 ii libglib2.0-0 2.58.3-2+deb10u2 ii libgtk-3-0 3.24.5-1 ii libgtk2.0-0 2.24.32-3 ii libjsoncpp1 1.7.4-3 ii libpango-1.0-0 1.42.4-8~deb10u1 ii libstartup-notification0 0.12-6 ii libstdc++6 8.3.0-6 ii libvpx5 1.7.0-3+deb10u1 ii libx11-6 2:1.6.7-1 ii libx11-xcb1 2:1.6.7-1 ii libxcb-shm0 1.13.1-2 ii libxcb1 1.13.1-2 ii libxext6 2:1.3.3-1+b2 ii libxrender1 1:0.9.10-1 ii libxt6 1:1.1.5-1+b3 ii psmisc 23.2-1 ii x11-utils 7.7+4 ii zlib1g 1:1.2.11.dfsg-1 Versions of packages thunderbird recommends: ii hunspell-en-us [hunspell-dictionary] 1:2018.04.16-1 pn lightning <none> Versions of packages thunderbird suggests: ii apparmor 2.13.2-10 ii fonts-lyx 2.3.2-1 ii libgssapi-krb5-2 1.17-3 -- no debconf information
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