Dragging tabs to new/other windows
I've seen this issue around from other people, but I haven't seen any resolution yet. This seems like a more complex feature to add, but it's very important to ease of use and minimum feature matching with chrome. I usually drag a tab off to my 2nd monitor to quickly continue doing something (and use that tab for say, reference, or social media streams). Vivaldi doesn't let you drag tabs, instead you have to right click -> move to -> new window, which is a lot more annoying of a workflow.