In latest hourry, Session restore is broken if about:addons exists in previous session Steps To Reproduce: 1. Browser start with browser.tabs.remote.autostart = true 2. Open any web pages in several tabs (e.g. https://www.mozilla.org/en-US/firefox/desktop/trust/ http://www.yahoo.com https://www.mozilla.org/en-US/firefox/desktop/ 3. Open about:addons 4. Exit browser 5. Restart browser 6. Click "Restore Previous Session" Actual Results: about:addons tab is not restored. Several tabs are indicated as "New Tab", and do not display its contents after selected the tab. Expected Results: All tabs should be restored as expected. Tab contents should display after selected the tab. Regression window(fx) Good: https://hg.mozilla.org/integration/fx-team/rev/f150e176a823 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140819111025 Bad: https://hg.mozilla.org/integration/fx-team/rev/893fa8436b70 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0 ID:20140819114829 Pushlog: http://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=f150e176a823&tochange=893fa8436b70 Regressed by: 893fa8436b70 Mike Conley — Bug 1041917 - Make it possible to transition from non-remote to remote browsers while browsing away from about: pages. r=billm. feedback=mrbkap.

s/In latest hourry/In latest hourly/

I'll take a look at this today and see if we need to back out bug 1041917.

Backed out regressing bug 1041917.

Verified fixed on Windows 7 64-bit, using latest Nightly, build ID: 20140918030202.