In Firefox, open about:config and set dom.event.contextmenu.enabled
to false
. That should take care of it for all websites, but it also disables some right-click features that a very few websites add.
Otherwise, the userscript for this particular website appears to be dirt simple. Here's the complete script:
// ==UserScript== // @name _Stop contextmenu vandalism // @include http://YOUR_SERVER.COM/YOUR_PATH/* // ==/UserScript== document.body.removeAttribute ("oncontextmenu");
Just adjust YOUR_SERVER.COM/YOUR_PATH
as needed.