STR: 1. pull from https://hg.mozilla.org/integration/mozilla-inbound/rev/ccf75f2fa112601fad892b26118381b0634ed381 2. ./mach build 3. Notice that ./mach test toolkit/components/places/tests/unifiedcomplete/test_avoid_middle_complete.js FAILS The reason it fails seems to be that test_sort_date_site_grouping is disabled (via skip_if: () => true) - see bug 1275746 comment 36 for stack trace. If we comment out that test, it passes, and if we remove the skip_if, it fails normally. The test doesn't seem to be skipped properly.