Pretty good! Rated 4 out of 5 stars

Decent replacement for the ruined Multirow Bookmarks Toolbar. To see titles all the time, *uncheck* items in "Bookmarks names displaying/hiding" section and check "Multi-Row bookmarks bar" and "Show the name of bookmarks". One complaint: I get occasional slight pauses while navigating live bookmark dropdown lists with a mouse, which didn't happen with Multirow Bookmarks Toolbar.

This review is for a previous version of the add-on (1.2.0). 

Yes. At the moment optimize the new version.If you want, I can offer a the light version that allows you to do a few lines, but with less load on your browser.
http://aloneindark.tk/blog/?p=324 - Light version in my blog.