[Bug 1901055] [NEW] [snap] choppy private window + non-private window

[Francois Thirioux]

Public bug reported:

When I open a private window when using a normal window and if I let
both windows open, I get some very short hangs, without any crash or
whatever.

Never experience that with FF non-snap. Never experience that with only
1 FF window open.

A sample of FF stuff in logs:

17:59:48 MainThread: Failed to load module "canberra-gtk-module"
17:53:46 kernel: audit: type=1326 audit(1603382026.762:329): auid=1000 uid=1000 gid=1000 ses=3 subj=snap.firefox.firefox pid=22194 comm="firefox-bin" exe="/snap/firefox/443/firefox-bin" sig=0 arch=c000003e syscall=203 compat=0 ip=<deleted_by_me> code=0x50000
17:53:46 firefox-bin: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 subj=snap.firefox.firefox pid=22194 comm="firefox-bin" exe="/snap/firefox/443/firefox-bin" sig=0 arch=c000003e syscall=203 compat=0 ip=<deleted_by_me> code=0x50000
17:53:46 kernel: audit: type=1326 audit(1603382026.746:325): auid=1000 uid=1000 gid=1000 ses=3 subj=snap.firefox.firefox pid=22194 comm="firefox-bin" exe="/snap/firefox/443/firefox-bin" sig=0 arch=c000003e syscall=203 compat=0 ip=<deleted_by_me> code=0x50000
17:53:46 firefox-bin: SECCOMP auid=1000 uid=1000 gid=1000 ses=3 subj=snap.firefox.firefox pid=22194 comm="firefox-bin" exe="/snap/firefox/443/firefox-bin" sig=0 arch=c000003e syscall=203 compat=0 ip=<deleted_by_me> code=0x50000
17:47:55 dbus-daemon: apparmor="DENIED" operation="dbus_bind"  bus="session" name="org.mpris.MediaPlayer2.firefox.instance19664" mask="bind" pid=19664 label="snap.firefox.firefox"
17:47:40 kernel: audit: type=1107 audit(1603381660.470:321): pid=1361 uid=103 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call"  bus="system" path="/org/freedesktop/RealtimeKit1" interface="org.freedesktop.RealtimeKit1" member="MakeThreadRealtimeWithPID" mask="send" name="org.freedesktop.RealtimeKit1" pid=19664 label="snap.firefox.firefox" peer_pid=1620 peer_label="unconfined"
 exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
17:47:40 kernel: USER_AVC pid=1361 uid=103 auid=4294967295 ses=4294967295 subj=unconfined msg='apparmor="DENIED" operation="dbus_method_call"  bus="system" path="/org/freedesktop/RealtimeKit1" interface="org.freedesktop.RealtimeKit1" member="MakeThreadRealtimeWithPID" mask="send" name="org.freedesktop.RealtimeKit1" pid=19664 label="snap.firefox.firefox" peer_pid=1620 peer_label="unconfined"
 exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  [snap] choppy private window + non-private window

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