From MozillaZine Knowledge Base

Background

Firefox 2 introduces a built-in Session Restore feature, allowing the user to continue browsing from where they left off if browser restarts. This preference used to control whether the last saved session is restored each time the browser starts.

It has been superseded by browser.startup.page in builds with bug 340898 fixed (Firefox 2 beta 2 and later, or nightly builds after July 19, 2006).

Possible values and their effects

True

Restore the previous session each time the browser starts.

False

Do not restore the previous session. (Default)

Caveats

• browser.sessionstore.enabled must be true for this preference to have an effect.

First checked in

2006-04-26 by Mike Connor

Has an effect in

• Mozilla Firefox (nightly builds since 2006-04-26, replaced with browser.startup.page=3 since late July 2006)

Related bugs

• Bug 328154 - Restore User's Session on App Launch
• Bug 328159 - Wire up the Session-data Service
• Bug 340898 - Remove the pref .sessionstore.resume_session in favor of .startup.page

Related preferences

• browser.sessionstore.enabled
• browser.sessionstore.interval
• browser.sessionstore.max_tabs_undo
• browser.sessionstore.resume_from_crash
• browser.sessionstore.resume_session_once

External links

• Session Restore - MozillaWiki