Rated 4 out of 5 stars

The menus look a little overkill. Previously I've used the ABP Element Hiding Helper, and never had to user anything more advanced than "wider"/"narrower". (Which would be nice to see here). So it might be better to disable the advanced menu by default.

Other than that - it's working great so far, and means I can ditch ABP, which I'm not particularly keen on.

This review is for a previous version of the add-on (0.3.3.1-signed.1-signed). 

Instead of using the context-menu, after you clicked on the yarip-toolbar-item, you can use the keyboard-keys `p' (parent) and `c' (child) to navigate up and down the elements and `b' (blacklist) to remove the selected element. You can add the icon to a toolbar by following these instructions:

http://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars#w_how-do-i-customize-or-rearrange-toolbar-items