Is the problem with the structure of the context menu? There is no built-in way to modify the menu.

Or is the problem that the menu stays open until you press the Esc key to close it? There is a preference that makes menus stay open:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.

(2) In the search box in the page, type or paste ui.popup.disable_autohide and pause while the list is filtered

You can double-click the preference to change the behavior:

• true => menus close after use
• false => menus may stay open until you press the Esc key

More info on about:config: Configuration Editor for Firefox.

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