Created attachment 321419 [details] Stacktrace It crashed while I was opening a website of an online course on edx.org. The website has a video and JavaScript elements. Downstream bug: https://bugs.launchpad.net/bugs/1718631 DistroRelease: Ubuntu 16.04 Package: libwebkit2gtk-4.0-37 2.16.6-0ubuntu0.16.04.1 StacktraceTop: _priv_gst_element_state_changed (element=element@entry=0x7fc36c10e0d0, oldstate=oldstate@entry=GST_STATE_PAUSED, newstate=newstate@entry=GST_STATE_READY, pending=pending@entry=GST_STATE_VOID_PENDING) at gstelement.c:2279 gst_element_continue_state (element=element@entry=0x7fc36c10e0d0, ret=ret@entry=GST_STATE_CHANGE_SUCCESS) at gstelement.c:2382 gst_element_change_state (element=element@entry=0x7fc36c10e0d0, transition=<optimized out>) at gstelement.c:2687 gst_element_continue_state (element=element@entry=0x7fc36c10e0d0, ret=ret@entry=GST_STATE_CHANGE_SUCCESS) at gstelement.c:2356 gst_element_change_state (element=element@entry=0x7fc36c10e0d0, transition=transition@entry=GST_STATE_CHANGE_PLAYING_TO_PAUSED) at gstelement.c:2687
Which version of GStreamer are you using? Can you please try with 1.12.4 which is the latest stable release?
1.8.3 it seems. So yeah, please try a recent release.
Please re-open if you manage to try again with gst 1.12.x.