I would imagine it's easier for a site owner to provide this than get everyone to install a browser extension.

I think anothermachine meant it should be default behavior in browsers. I agree, with the attribute to disable or enable this from the html it would be a nice feature for browsers to implement.

I just made a simple Chrome Extension out of it: https://chrome.google.com/webstore/detail/simple-form-recove...

It should be a browser feature, option or extension, for users to have control over it from one place.