From MozillaZine Knowledge Base
This preference controls whether to automatically accept session cookies (cookies that are removed when the browser closes) when network.cookie.lifetimePolicy is set to 1, which causes the application to prompt for a cookie's lifetime.
Possible values and their effects
Automatically accept session cookies.
Prompt for sessions cookies as it would for other cookies. (Default)
- network.cookie.lifetimePolicy must be set to 1 for this preference to take effect.
First checked in
Has an effect in
- Netscape (all versions since 7.2)
- Mozilla Suite (all versions since 1.7a)
- Mozilla Firefox (all versions since 0.9)
- SeaMonkey (all versions)