Browser.sessionstore.privacy level
From MozillaZine Knowledge Base
Background
Firefox 2.0 introduces a built-in Session Restore feature, allowing the user to continue browsing from where they left off if browser restarts. This preference controls when to store extra information about a session: contents of forms, scrollbar positions, cookies, and POST data.
Possible values and their effects
0
Store extra session data for any site. (Default starting with Firefox 4.)
1
Store extra session data for unencrypted (non-HTTPS) sites only. (Default before Firefox 4.)
2
Never store extra session data.
Recommended settings
Leaving this preference set to 1 will avoid re-submitting data to secure sites — such as banks and online stores — and prevents duplicate transactions from taking place. Use caution when setting this preference to 0.
First checked in
Has an effect in
- Mozilla Firefox (nightly builds since 2006-04-26; 2.0)
Related bugs
- Bug 328159 - Wire up the Session-data Service
- Bug 424872 - Support form restore for securely transmitted site (HTTPS) - changed the default for Firefox 4.
Related preferences
- browser.sessionstore.postdata
- browser.sessionstore.privacy_level_deferred (new in Firefox 4) - controls what gets saved by Session Restore when quitting (not crashing or restarting to install updates/addons) with browser.startup.page not set to restore previous session on startup. The possible values for this preference are the same as described on this page. See also: zpao's blog post (note that the information about the default values in that post is outdated).