Attached file causes Firefox to hang permanently. The combination of mask, filter and transform seems to cause this. Deleting either will result in Firefox to continue working. Also, removing some of the path segments will "improve" the situation. This was reproducible on Windows and Linux, in both 19.02 and 21.0a2 (2013-03-14).

Regression window(m-c) Good: http://hg.mozilla.org/mozilla-central/rev/688734575830 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120802041638 Bad: http://hg.mozilla.org/mozilla-central/rev/074fb996dfd7 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120802062038 Pushlog: http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=688734575830&tochange=074fb996dfd7 Regression window(m-i) Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/a799b5bff84c Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120801155239 Bad: http://hg.mozilla.org/integration/mozilla-inbound/rev/b077c43a4306 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/17.0 Firefox/17.0 ID:20120801163038 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=a799b5bff84c&tochange=b077c43a4306 Triggered by : Bug 776054 svg.display-lists.painting.enabled = false helps

bp-c3cbcc2f-e639-4531-94ed-9fece2130318 (Stack using http://benjamin.smedbergs.us/crashfirefox.exe run crashfirefox.exe to kill the Firefox process and then report the crash (via the crashreporter) so that we can see the stack at the time of the hang)

@Alice0775 White: How can I and link the crash report here? (And is there something similar to crashfirefox.exe for Linux?)

(In reply to ThomasW from comment #3) > @Alice0775 White: How can I and link the crash report here? (And is there > something similar to crashfirefox.exe for Linux?) Maybe gdb helps. https://developer.mozilla.org/en-US/docs/How_to_get_a_stacktrace_for_a_bug_report#Linux