*** This bug is a duplicate of bug 1659922 *** https://bugs.launchpad.net/bugs/1659922
@thomas303 Thank you very much! The system was not broken, because I disabled apparmor for Firefox as you said in the opening post (altough you intended it just for testing). Anyway, your instructions were very complete, and my doubt was mainly compatibility with Ubuntu update. But as you said, "Now that the original profile file remains unchanged, apt- get won't complain when the official package gets updated.", so it's fine for me. And it works like a charm, by the way! -- 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