Thanks for your review and I'm sorry, it's not bloatware to harvest data it's just a little project I've made but it has not been updated for a while so it's maybe broken plus I use it mainly on chrome so haven't tested on Firefox recently. There are other add-ons doing the same until it's updated so I hope you find one working.

EDIT: I've uploaded a new version that should be working with lastest firefox, should be available in less than 24h.