rmottola upstream pushed lots of commits of front-end side, so some merge commits issued and new test build is uploaded: http://o.rths.ml/gpc/files1.rt/arcticfox-27.9.18.win32-20191109.7z - Bug 1090583 part 2 - Fix the property count check in MonitorAssign to check the actual count instead of the capacity. r=bhackett (3f1daa802) - Bug 1090583 - Fix a pre-existing issue with MLoadElementHole and negative index checks. r=bhackett (1278f0b1a) - Bug 1141190 - Remove docshell/test/moz.build;