Very useful . . . Rated 4 out of 5 stars

. . . But it seems to have stopped working after installing the Tab Utilities extension. I have Stay-Open Menu set to keep menus open when Ctrl-clicking bookmarks; and I set Tab Utilities to the "default action" when I Ctrl-click bookmarks, but this didn't solve the problem. Any insights or suggestions would be most appreciated. Thanks.

This review is for a previous version of the add-on (1.5.6). 

Try going to Tab Utilities Options and in the 'Mouse' section, change Middle-click on Bookmarks to either 'Stay menu open' or 'Invert focus/Stay menu open'.That should enable Stay-Open Menu to keep the menu open for Ctrl-clicks. If you need further assistance please either post to the support forum or contact me via the form at http://www.shadetreeapiary.com/extension/Forms/contactform.htm.