From release notes: Right clicking on a document brings up a context menu which allows you to open the document in a new tab or a new window or delete it.
True. However, there are also tool tips that pop up for these menu items, and they are occupying the same space as the context menu. Something needs to give.

Personally, I really dislike the implementation of this feature. Context menus for menu items? How un-Mac-like is that? That must violate a Mac development guideline somewhere.
But maybe I'm wrong. Anyone have other Mac programs where the menu items have context menus?
Suggested fix: Let the menu items have sub-menus off to the right. See the bookmarks menu in Safari if you need an example.