The ability to hide elements from the toolbar through their context menus them would improve the experience for users who aren't coming from Safari and know that you can Cmd-drag them out.
I don't understand. Can you give an example of an app that does this, with some images, or create a graphic explaining this?
eirk See this related suggestion.
'Remove from Toolbar' option on right click menu before customize toolbar. This would be handy for all icons on toolbar not just extensions. Extension icons should add Remove from Toolbar and Customize Toolbar... to the end. Privacy icon should have full toolbar icon menu below Show Notificaiton