I happen to very seldom use the mouse, and once I've copied something to the X clipboard, I might return to a shell, and middle-click *anywhere* in the shell window. Unfortunately, it regularly happens to be a place where either URL or mail address is standing, leading to a browser firing up, or exo showing up asking me the application I'd like to send an email with (I didn't configure exo to use mutt…). It would be very nice if calling exo_url_show_on_screen() from terminal_widget_open_uri() could be made configurable (through the advanced tab I guess). Usually, I'm selecting the URL/@ I intend to use, and paste it where it belongs. I think one should still be able to use a right-click and then select “open the link” or “write an email” once this feature made configurable, and once this function call disabled. Thanks for considering.
There is a hidden setting for this. Edit ~/.config/Terminal/terminalrc and set MiscHighlightUrls to FALSE. The hidden settings are described in the manual, but believe me nobody reads them, except the translators :-p The same bug was recently opened, but, I wonder if it should really get closed again. The bug was #5946. Btw, thanks and nice to see you hanging on B.x.o filing some issues!
Oops. Thanks for the pointer, that indeed seems to suit my needs.