Mixed opinions on this. More than once I've accidentally middle clicked on a text box and sent the contents to some server. Or middle clicking the new tab butto

Mixed opinions on this. More than once I've accidentally middle clicked on a text box and sent the contents to some server. Or middle clicking the new tab button will navigate to whatever is in your clipboard, or do a web search if it isn't a URL. Hasn't been anything confidential yet, but it is possible. I try to clear the clipboard asap for this very reason.