Backed out 6 changesets (bug 1915798, bug 1904665, bug 1918049) for causing wpt failures in input-events-get-target-ranges-joining-dl-elements.tentative.html CLOSED TREE
Backed out changeset 99755cd9107c (bug 1915798)
Backed out changeset 937789e1206d (bug 1915798)
Backed out changeset a204942669fe (bug 1904665)
Backed out changeset 56bcb0cc0d7f (bug 1904665)
Backed out changeset 148a13606d43 (bug 1904665)
Backed out changeset ae1bf54a9000 (bug 1918049)
gecko-commit: 1135a9c2def6beeab9e5869304ea37d7099280a2