Another vote to allow hiding/removing items from the toolbar. There are buttons in there that don't need to be always visible (like share, screenshot, favorites, etc...) all other browsers allow for this and it's making me wanna switch
I have the same issue since version 51/52 it's really annoying to the point that I changed browser. But I prefer Opera so I hope it will be fixed since it's been month now.
I'm on MacOS 10.14.2.