the newtab page changes the undo behavior of newly created tabs. steps: 1. open any page 2. create a new tab 3. press undo expected: the url of the initially loaded page should immediately fill the urlbar. actual: the urlbar is populated with about:newtab notes: pressing undo a second time correctly populates the urlbar.
Interesting that you actually use this, never was an intentional feature :)
Fixed by bug 725200.
Mozilla/5.0 (X11; Linux x86_64; rv:13.0a1) Gecko/13.0a1 Firefox/13.0a1 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:13.0) Gecko/13.0 Firefox/13.0a1 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/13.0 Firefox/13.0a1 Verified on latest Firefox Nightly with steps in comment 0.