The mozilla refresh policy

It’s happened more than once that I had trouble finding this: in mozilla and family, the refresh policy is to be found in about:config, key browser.cache.check_doc_frequency. The meaning is as follows:

0	Once per session
1	Every time I view the page
2	Never
3	When the page is out of date (this is the default)

For more stuff like this: see http://www.mozilla.org/quality/networking/docs/netprefs.html.