Hi,
I found this bugreport because I have the same issue:
ii thunderbird 1:52.4.0-2~exp1 amd64
mail/news client with RSS, chat and integrated spam filter su
ii firefox 57.0-1 amd64 Mozilla
Firefox web browser
When I click a link in an email I get the following error in journalctl:
Nov 24 09:09:27 wspk audit[11225]: AVC apparmor="DENIED"
operation="exec" profile="thunderbird" name="/usr/lib/firefox/firefox"
pid=11225 comm="thunderbird" requested_mask="x" denied_mask="x"
fsuid=22677 ouid=0
Nov 24 09:09:27 wspk kernel: audit: type=1400 audit(1511510967.408:270):
apparmor="DENIED" operation="exec" profile="thunderbird"
name="/usr/lib/firefox/firefox" pid=11225 comm="thunderbird"
requested_mask="x" denied_mask="x" fsuid=22677 ouid=0
Adding
/usr/lib/firefox/firefox Cx -> sanitized_helper,
to /etc/apparmor.d/usr.bin.thunderbird didn't help. (after restarting
thunderbird. or do I need to do something else?)
thanks
Philipp