Feedback so far
Main item: Shift-F3 should search backwards when using find in page (F3 searches forwards in this mode) Lesser Items: The X on a tab being invisible makes it harder to close the tab because I have nothing to aim at while moving my mouse. If there is empty space to the right of the tabs it should be grab-able for moving the window. The tiny margin at the top is hard to hit. I know tabs make this hard and no other browser does it, but if I could see more of the page title that would be nice.
Oh and I forgot:
The browser is called "Vivaldi". The icon should obviously be a violin or something.
(And even if it has to be a V I don't really like the play-dough look.)