It would be great if this extension had an option to actually emulate the middle click. This would allow extensions like Redirect Remover and MClickFocusTab to function properly when right clicking a link.
All extensions works in one "level". So all of them will receive both events: real right-click and emulated middle-click. If Right Links tries prevent right-click event, another extensions should check event.defaultPrevented (https://developer.mozilla.org/en/DOM/event.defaultPrevented), but the order of event listeners calling is "random".
Additionally Redirect Remover should works like Redirector extension (https://addons.mozilla.org/firefox/addon/redirector/): handle internal links opening, not clicks or other user actions.
In the next Right Links version will be added "long" left-click feature, it's a bit similar to MClickFocusTab.