Missing New Tab [+] Button Rated 4 out of 5 stars
Would be the best fitting theme for Fx till now ...if the mostly used button would not be missing (right beside the tab windows) -> [ + ]
...and i don't talk about the Icon "New Tab" you could add into the toolbar (= waste of space). moreover the close button inside tabs is also important to have IMHO!
i hope you will update that... thx!