Good addon but has 3 major issues:
1. No way to either invoke it or disable it by pressing CTRL or ALT key.
2. No time out to cancel the action - if you right click it will start working and keep working and there is no way to cancel - typically gestures (for e.g., Foxy gestures) would time out after a certain period and the value is customizable
3. Interferes with gestures addons such as Foxy Gestures that use right clicks as well. The interference is quite huge as you invariably end up removing the add-on unfortunately.
I hope these can be addressed at some point. In the meantime, if opening multiple links is what you are looking for, you may use:
Open Links in Tabs or FoxyLink addons.