Rated 4 out of 5 stars
A brilliant add-on which provides some much needed improvements to the history drop-down (like, for example, a drop-down menu rather than a sidebar pane) and customisation options for the firefox menu. Also, the ability to get rid of those god awful drop-markers (which become redundant once you've been using the browser for more than 10 seconds and thus know which buttons open drop-down menus and which don't).
One little snag. It's not compatable with the Firefox Share add-on. This may be an issue with the Firefox Share add-on though, as it is only an alpha release.