At the very least I'd want something to override ctrl+tab tab switching order (by most recently used instead of tab order in tab bar), and a popup showing the tabs in that order.
Edit: Apparently the about:config setting browser.ctrlTab.previews gives you MRU and a popup. Unfortunately it shows large thumbnails of the tabs instead of just a list of the titles.
https://bugzilla.mozilla.org/show_bug.cgi?id=1226546
At the very least I'd want something to override ctrl+tab tab switching order (by most recently used instead of tab order in tab bar), and a popup showing the tabs in that order.
Edit: Apparently the about:config setting browser.ctrlTab.previews gives you MRU and a popup. Unfortunately it shows large thumbnails of the tabs instead of just a list of the titles.