Attached is a gdb trace of when the error happens. Here is a snippit of it:
11 0x00007fb2a6df8e88 in clutter_parse_args (error=0x7ffc8f85b1d8, argv=0x0, argc=0x0) at clutter-main.c:1770 #12 clutter_init (argc=0x0, argv=0x0) at clutter-main.c:1832 #13 0x00007fb2a70c3724 in ?? () from /usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstclutter.so #14 0x00007fb2b5358ba7 in gst_plugin_register_func (plugin=0x7fb2b71e9390, desc=0x7fb2a72cc6c0 <gst_plugin_desc>, user_data=0x0) at gstplugin.c:523 #15 0x00007fb2b535aa45 in _priv_gst_plugin_load_file_for_registry ( filename=filename@entry=0x7fb2b595f100 "/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstclutter.so", registry=0x7fb2b7d95220, error=error@entry=0x0) at gstplugin.c:826 #16 0x00007fb2b53671de in gst_registry_scan_plugin_file ( context=context@entry=0x7ffc8f85b5c0, filename=filename@entry=0x7fb2b595f100 "/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstclutter.so", file_size=62848, file_mtime=1433999812) at gstregistry.c:1180 #17 0x00007fb2b53680fb in gst_registry_scan_path_level ( context=context@entry=0x7ffc8f85b5c0, path=path@entry=0x7fb2b53bb6a8 "/usr/lib/x86_64-linux-gnu/gstreamer-1.0", level=level@entry=10) at gstregistry.c:1338 #18 0x00007fb2b53682d6 in gst_registry_scan_path_internal ( context=context@entry=0x7ffc8f85b5c0, path=path@entry=0x7fb2b53bb6a8 "/usr/lib/x86_64-linux-gnu/gstreamer-1.0") at gstregistry.c:1365 #19 0x00007fb2b5369d94 in scan_and_update_registry (write_changes=1, error=0x7ffc8f85b5b8, registry_file=0x7fb2b72fecc0 "/home/dws/.cache/gstreamer-1.0/registry.x86_64.bin", default_registry=0x7fb2b7d95220) at gstregistry.c:1660 #20 ensure_current_registry (error=0x7ffc8f85b5b8) at gstregistry.c:1752 #21 gst_update_registry () at gstregistry.c:1828 ---Type <return> to continue, or q <return> to quit--- #22 0x00007fb2b530ab3f in init_post (context=<optimized out>, group=<optimized out>, data=<optimized out>, error=<optimized out>) at gst.c:716 #23 0x00007fb2e88c6d78 in g_option_context_parse () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 ** Attachment added: "gdb trace" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1521789/+attachment/4536195/+files/gdb.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1521789 Title: firefox freezes with GStreamer-WARNING **: External plugin loader failed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1521789/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs