not just i386. Occurs here with 64bit Flash v27 and 64bit FireFox v56. Test page is https://helpx.adobe.com/flash-player.html and then press "check now". Logs in console :
/usr/lib/firefox/plugin-container: symbol lookup error: /usr/lib/firefox/libxul.so: undefined symbol: gdk_screen_get_monitor_workarea [Parent 26603] WARNING: pipe error (137): Connection reset by peer: file /build/firefox-6SoPIC/firefox-56.0+build6/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 353 /usr/lib/firefox/plugin-container: symbol lookup error: /usr/lib/firefox/libxul.so: undefined symbol: gdk_screen_get_monitor_workarea [Parent 26603] WARNING: pipe error (136): Connection reset by peer: file /build/firefox-6SoPIC/firefox-56.0+build6/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 353 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1720908 Title: Firefox cannot load Flash because of libxul broken dependency To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1720908/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs