That's a terrible use case for a plugin. UI behavior should be well-defined and declaratively specified. Installing a plugin just to tell the browser what to do with a mouse click is total overkill.
Web UI is well-specified. Click is follow hyperlink. Right click is browser context menu. Middle click is open in new tab, also available from the context menu.
Whether a link opens in a new tab without user intervention is up to the link, and is way overused IMO.