Doesn't remove from recent apps Noté 2 sur 5 étoiles
It may terminate firefox, but it doesn't remove it from recent apps so it's still useless to me.
(HTC m7, android 4.4.2, sense 6)
Free things are worth what you pay for them :-)
Yah, I can't do that from inside the browser with an add-on.
Neither does Firefox itself.
You can usually change your Android OS level settings to not keep recent apps if privacy is your concern.