Since before version 64, ~2018. There were a bunch of add-ons adding it back in to the menu since Mozilla decided to get of it from the menu but still keep functionality. Besides that, I have no idea how far back they had it.
Since before version 64, ~2018. There were a bunch of add-ons adding it back in to the menu since Mozilla decided to get of it from the menu but still keep functionality. Besides that, I have no idea how far back they had it.