[tor-bugs] #32482 [Applications/Tor Launcher]: Tor browser doesn't load, blank screen

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#32482: Tor browser doesn't load, blank screen
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 Reporter:  rerunner          |          Owner:  brade
     Type:  defect            |         Status:  new
 Priority:  Medium            |      Component:  Applications/Tor Launcher
  Version:  Tor: unspecified  |       Severity:  Normal
 Keywords:                    |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
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 Hello,

 My Tor browser bundle has recently stopped loading. When running the
 launcher, the "Connect to Tor" window opens but never completely loads,
 and I only see a blank screen (screenshot attached). There are many
 AppArmor "DENIED" messages in /var/log/syslog, here's a snippet:

 Launching Tor Browser.

 Running /home/<user>/.local/share/torbrowser/tbb/x86_64/tor-browser_en-US
 /start-tor-browser.desktop

 audit: type=1400 audit(1573611720.279:30): apparmor="DENIED"
 operation="capable" profile="torbrowser_firefox" pid=5055
 comm="firefox.real" capability=21  capname="sys_admin"

 audit: type=1400 audit(1573611722.971:31): apparmor="DENIED"
 operation="exec" profile="torbrowser_firefox" name="/usr/bin/lsb_release"
 pid=5080 comm="firefox.real" requested_mask="x" denied_mask="x" fsuid=1000
 ouid=0

 audit: type=1400 audit(1573611727.451:32): apparmor="DENIED"
 operation="mknod" profile="torbrowser_firefox"
 name="/dev/shm/org.mozilla.ipc.5055.0" pid=5055 comm="firefox.real"
 requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

 audit(1573611795.295:68): apparmor="DENIED" operation="capable"
 profile="/usr/bin/man" pid=5208 comm="man" capability=1
 capname="dac_override"

 I'm running Debian 10:

 # cat /etc/os-release
 PRETTY_NAME="Debian GNU/Linux 10 (buster)"
 NAME="Debian GNU/Linux"
 VERSION_ID="10"
 VERSION="10 (buster)"
 VERSION_CODENAME=buster
 ID=debian
 HOME_URL="https://www.debian.org/"
 SUPPORT_URL="https://www.debian.org/support"
 BUG_REPORT_URL="https://bugs.debian.org/"

 # uname -r
 4.19.0-6-amd64

 Also using torbrowser-launcher version 0.3.2. Please let me know if you
 need any further info.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/32482>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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