More and more applications are moving to the cloud: Google Docs for productivity apps, Meebo for instant messaging, Gmail for e-mails, Salesforce for CRM, etc.
Yet, I\'
Just for completeness: Opera has no oncontextmenu
and no simple possibility to suppress the context menu on right click.
It's not what users expect.
It's also not particularly "discoverable": like old-school Flash web sites where you had to roll your mouse over a graphic to get the site to do something, right-clicking is not necessarily intuitive.
Also, because some people may not have a two-button mouse (I'm looking at you, Apple users).
It is not how people are used to work in their browser, you shouldn't change default behavior. Users aren't expecting something to happen when they rightclick.
As i read in your forst anwser this is true it would be in the context menu it might mess with some things but as i have madde a btoolbar thta floats for my site to do anything you can use keyboard shortcuts so i see a mild and doom future for right click at all i see toolbars everywhree on websites today
Most users expect the right-click menu to bring up the browser context menu, so doing it to bring up an app-specific menu is not something they would try.