Reproducible on Nightly 38.0a1 (Build ID: 20150202030232) *only* with e10s enabled Platforms: Windows 7 64-bit, Ubuntu 14.04 32-bit, Mac OS X 10.9.5 and 10.10 Steps to reproduce: 1. Launch Nightly. 2. Go to about:support 3. Refresh Nightly. 4. After refresh is applied, select any of the 2 available options ('Restore all Windows and Tabs' or 'Restore only the ones you want') and click 'Let's go' button. Expected result: Tabs/Windows are successfully restored. Actual result: Tabs/Windows are not restored. Notes: 1. Regressed by bug 1087618 2. Screencast: http://goo.gl/tnvwNa 3. Browser Console output: 'TypeError: document.getElementById(...) is null' message thrown by boutSessionRestore.js:109:2

Ups, forgot to add the fact that I'm unable to select which tabs to restore via 'Restore only the ones you want' option, issue visible also in the screencast.

Turns out the errorTryAgain id is also needed for aboutWelcomeBack. Fixes bug 1127621 as well.

Comment on attachment 8560006 [details] [diff] [review] Patch Review of attachment 8560006 [details] [diff] [review]: ----------------------------------------------------------------- Please separate these patches out so that the aboutWelcomeBack.css changes are in bug 1128882. r=me for both changes. ::: browser/themes/shared/aboutWelcomeBack.css @@ +23,5 @@ > + > +treechildren::-moz-tree-image(icon), > +treechildren::-moz-tree-image(noicon) { > + padding-right: 2px; > + margin: 0px 2px; margin: 0 2px;

Split up the checkbox fix in bug 1127621.

Bug is fixed!

Mistakenly filed against Firefox 38 and should be instead 38 Branch. Sorry for the spam. dkl

OS : Windows 7 ultimate 64-bit. I have tried to reproduced the bug on nightly 38.0a1(20150202030232)and I have seen the bug in it. The fixed is verified on nightly 41.0a1(20150521030204).