Doesn't seem to work on the new Firefox Quantum, I hope that'll be fixed shortly?
Edit: Samsung Galaxy S3 - Android - Firefox Beta 5.0b3 - I am still asked to acknowledge cookies. Edit2: Sorry, nm, it works fine on Firefox 57.0. Wasn't sure if that was supposed to be the new version, seems it is.
I also have it (Firefox Quantum, 57.0, 64-bit). It works just as fine as before. Edit: Firefox Beta 5.0b3 is 6 years old. You should update you firefox :)
