Created attachment 8637799 [details] tab-separator.png When opening a new tab with Ctrl+T, occasionally a tab-separator is shown behind the new-tab button for a very short time at the beginning of the animation. May be more noticeable on slower machines. See attachment. PS: The lack of URL in the locationbar at the beginning of the transition to the new tab seems to be weird, too. Regression-range: m-c: Last good revision: e046475a75cb (2015-03-27) First bad revision: ad587ca628cf (2015-03-28) Pushlog: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=e046475a75cb&tochange=ad587ca628cf m-i: Last good revision: 8c02abfe5360 First bad revision: 8194018355f6 Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=8c02abfe5360&tochange=8194018355f6 8194018355f6 George Wright — Bug 1066531 - Delay tab switching until content is ready in e10s mode r=mconley,mstange
Created attachment 8637812 [details] tab-separator-close.png Also happening when closing a tab, here about:newtab.
User Agent Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:46.0) Gecko/20100101 Firefox/46.0 Build ID 20160208004010 User Agent Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0 Build ID 20160208030244 Tested on Windows 7 x64 with the Aurora 46.0a2 build and Nightly 47.0a1 build. I can sometimes reproduce the problem.
Status: UNCONFIRMED → NEW
Ever confirmed: true
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1183135
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