Tried shifting to Opera from FF recently (last time I was trying few years ago, there was no suitable Adblocker available). Backed out this time as well because

Tried shifting to Opera from FF recently (last time I was trying few years ago, there was no suitable Adblocker available). Backed out this time as well because it has no official support for moving your history (which I would not want to loose). Makes no sense why would Opera not make it simple for people to move.