Why are people downvoting you? I totally agree with you. Firefox has the upper edge (pun unintended) on the backend technology that causes them to resist Google’s greedy changes, but acts just like a for-profit company when it comes to the UI.

Look how much pointless whitespace their is on the tab bar. It was so “popular” that Chrome recently came in and copied that change. But Vivaldi just goes its own way, trying to make the most competitive browser it can.