What is a edit button?
A longtime request from Twitter's user base, the edit button allows users to edit their tweets for up to 30 minutes after posting — something that could help users clarify or correct a mistake in their tweet, fix a small typo or add hashtags, among other things.
How to remove Toolbar in Vivaldi?
Vivaldi's Status Bar is located at the bottom of Vivaldi's window allowing you to: Show or hide Panel bar. Ctrl + click to toggle on/off floating panel.