Rated 4 out of 5 stars

The only problem I found with this is, when I right-click on bookmarks tab (to edit links or link names, etc.) they open in new tab. So if there is a way of modifying the behavior for non-page-URL links, would be great.

This review is for a previous version of the add-on (0.3.5.2). 

See "Handle clicks on bookmarks" and "Handle clicks on history items" checkboxes in context menu of Right Links icon in Status Bar (item in Tools menu and toolbar button has same context menu).
Or you can wait 0.5 second for see context menu (extensions.rightlinks.showContextMenuTimeout preference in about:config).
And third way - use right-click with any modifier (e.g. shift + right-click).