defd68ece8
I can't repro this at all on win10 with either native or non-native menus, nor hacking my way so that all win7 styles apply, nor on win7 by hand on a VM... So that kinda sucks :( Let's take this very minor regression in this subtest? I don't think it's particularly worrisome (the select looks good in the mochitest failure screenshot and works ok in local testing...). Depends on D164693 Differential Revision: https://phabricator.services.mozilla.com/D165024