How long do browsers cache HTTP 301s?

Question

I am debugging a problem with a HTTP 301 Permanent Redirect. After a quick test, it seems that Safari clears its cache of 301s when it is restarted, but Firefox does not.

Answer 1

For testing purposes (to avoid cached redirects), people can open NEW PRIVATE WINDOW: click CTRL+SHIFT+N [if you use Mozilla, use P]