Normally when a user clicks a middle mouse button on a link on a web page, the link opens in a new tab. When a user clicks right mouse button, a context menu appears. Now there are some annoying sites that reassign this behavior, so when a user clicks a mouse button, they perform whatever they want, open popup windows, redirect wherever they want.
My guess, this is achieved through adding element event handlers like onclick="DoSomeAnnoyingStuff".
Is it possible to disable "onclick" event processing on a web page with uBlock Origin?