From https://webcompat.com/issues/8106 anonymous user report Step to reproduce: 1. Open http://samsung-updates.com/ 2. Click the dropdown select device above "watch us LIVE" Expect behavior: Show devices Actual behavoir: More than 1 seconds after install Windows KB2670838
dupe of bug 1118086 ?
disabling HWA did not fix this. So probably not related to Windows KB2670838. But disabling e10s fixed this. With e10s disabled, the dropdown opens instantly. So definitely a dupe of bug 1118086