[xnorswap]

While this is a great idea that no-doubt does help some people, beware this doesn't clean up all traces in the browser, and private/incognito is better at not keeping a history.

For example, there is a favicon cache in firefox.

If you query favicons.sqlite in your profile directory:

    select * from moz_pages_w_icons order by id desc limit 10;

Then you can see a recent history that isn't cleared up when you just clear history like this.