*** This bug is a duplicate of bug 1659922 *** https://bugs.launchpad.net/bugs/1659922
Just my 2 cents: we had the same problem here after the Firefox 51.0.1 update (just one machine is affected anyway, the others updated with no problem). The error message is NOT related to python, but I get graphics errors like the ones seen in bug #1643200: [GFX1]: Failed 2 buffer db=0 dw=0 for 0, 0, 1920, 876 [GFX1]: Failed 2 buffer db=0 dw=0 for 0, 0, 1920, 876 [GFX1]: Failed 2 buffer db=0 dw=0 for 0, 0, 1920, 876 Anyway, excluding Firefox from Apparmor (as with the OP's first suggestion) works around the problem. My suspect is bad interaction with the driver for the videocard of that specific machine on which we have the problem. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1659988 Title: Firefox apparmor profile: /usr/bin/python3: error while loading shared libraries: cannot apply additional memory protection after relocation: Permission denied Status in firefox package in Ubuntu: Confirmed Bug description: When I start Firefox, even when run as root, I get an error message: /usr/bin/python3: error while loading shared libraries: cannot apply additional memory protection after relocation: Permission denied As a result, Firefox only shows white or black content in browser tab (which is basically rendered empty). I can work around this issue with a cd /etc/apparmor.d/disable ln -s ./../usr.bin.firefox apt-get install --reinstall --purge apparmor libapparmor-perl libapparmor1 After that, content is rendered again. I had this problem earlier (https://bugs.launchpad.net/firefox/+bug/1643200) and worked around it by installing a firefox extension "ubuntu modifications". But after updating from 51.0.0 to 51.0.1, I got the same problem again and enabling or disabling the extension did not help any more. Same for enabling/disabling all the hardware acceleration and/or e10s settings in about:config. Now that it seems to be an apparmor profile issue, I think that can be fixed in a nice manner. And it also should see some priority. Therefore, I think it makes sense to have a clean new ticket for this. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: firefox 51.0.1+build2-0ubuntu0.16.04.1 ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35 Uname: Linux 4.4.0-59-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.20.1-0ubuntu2.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: thomas 3175 F.... pulseaudio BuildID: 20170125172221 Channel: Unavailable CurrentDesktop: GNOME-Flashback:Unity Date: Sat Jan 28 01:16:25 2017 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationDate: Installed on 2014-11-29 (790 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) Locales: extensions.sqlite corrupt or missing PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=51.0.1/20170125172221 (In use) RunningIncompatibleAddons: False SourcePackage: firefox Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to xenial on 2016-06-15 (226 days ago) dmi.bios.date: 12/06/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A16 dmi.board.name: 023HKR dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA16:bd12/06/2013:svnDellInc.:pnLatitudeE5510:pvr0001:rvnDellInc.:rn023HKR:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E5510 dmi.product.version: 0001 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1659988/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp