The tabs in the top bar and their "click-box" don't touch the very upper border of the window - there is a very small gap. This means, when Falkon is fullscreened (with no titlebar) it is not possible for a user to quickly shove their cursor to the very top of their monitor to click on tabs without having to worry about "overshooting" into the empty gap. I know this sounds like a minor nitpick, but for someone who is used to Firefox or Chromium (both have their tabs touching the top border), this adjustment would go a long way for quality of life reasons.