>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR_1: 1. Log in on site https://vk.com/ 2. Open messages - https://vk.com/im (optional: start a conversation with somebody) 3. Press F10 once AR: All content on the page immediately twitches to the bottom, so footer teleports by ~30px lower than usual. Then after 0.5s footer teleports back. ER: Footer shouldn't visually twitch, just like in non-e10s mode Note: This doesn't look like APZ issue - it seems that content area updates its height w/ delay
User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0 Build ID 20170130030205 I was able to reproduce the issue on the latest Firefox Release (51.0.1) and on the latest Nightly (54.0a1). It is not reproducible with e10s disabled.
status-firefox51: --- → affected
status-firefox52: --- → affected
status-firefox53: --- → affected
status-firefox54: --- → affected
Component: Untriaged → XP Toolkit/Widgets: Menus
Product: Firefox → Core
Too late for firefox 52, mass-wontfix.
status-firefox52: affected → wontfix
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