Also set network.disable.ipc.security to true and leave it that way. This prevents security errors in the tests which happen when we pop the pref.
--HG--
extra : rebase_source : 95f7ca7c3b71cdc0e3e6fd1cfb663a5653f3ab6f
The assertion encountered is:
Assertion failure: !gAppContentParents || !gAppContentParents->Get(mAppManifestURL), at ../../../dom/ipc/ContentParent.cpp:774
TEST-UNEXPECTED-FAIL | /tests/dom/browser-element/mochitest/test_browserElement_oop_CloseFromOpener.html | Exited with code 11 during test run
PROCESS-CRASH | /tests/dom/browser-element/mochitest/test_browserElement_oop_CloseFromOpener.html | application crashed (minidump found)
Thread 0 (crashed)