User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:35.0) Gecko/20100101 Firefox/35.0 Build ID: 20150108202552 Steps to reproduce: I have browser.tabs.onTop set to false. With this latest version of Firefox, when I click to drag a tab to reorder it, the entire window moves as well Actual results: Window moves instead of tab Expected results: Tabs should have been reordered.
This was an issue with classic theme restorer. It's been fixed, from what the add-on author has said. See bug 1123185.