Bug 754860 - Disable test_bug726904.html on OS X for too many intermittent failures
Bug 845190 - Disable test_645970.js on debug Linux for too many intermittent assertions
Bug 768482: Add URI of resource to "file not found" exception in asyncFetch(). r=bz
Bug 841028: Add last build ID to telemetry system info if build ID has changed. r=froydnj