Rated 5 out of 5 stars

This addon enables you to open links in a new tab via left-click+dragging while:

1) still maintaining the ability to highlight text, which neither All-in-One Gestures nor FireGestures can do.
2) in the Web Search Pro add-on, left-click+dragging text still activates drag-and-drop zones (as of version 2.8.2.3), although the anchor text of a link won't, but if you highlight the anchor text, you can use CTRL+Q to bring up Quick Type Search and it will automatically appear there.