Change the session store interval in Firefox

Mozilla Firefox has a feature called Session Store which restores all the previously open tabs and windows when your browser restarts in case of a crash. The Session Store Interval is the length of time period after which Firefox saves the open windows and tabs to the session store. The default value for the session store interval is 15 seconds (or 15000 milli-seconds), which means that Firefox saves all your Firefox windows and tabs after every 15 seconds. You can change this interval if you want. Here is how :

  1. Start Mozilla Firefox browser.
  2. Type about:config in the location bar and press Enter.
  3. Firefox will show a warning. Click on the button labeled I’ll be careful I promise. to proceed.
  4. In the Filter field, type sessionstore. You would see a preference named browser.sessionstore.interval as shown,

  5. Double click on browser.sessionstore.interval to change its value. You can enter anything you want. The value is in milli-seconds. So if you want to enter an interval of 50 seconds, you will have to enter a value 50000, etc. If you enter a very small value, Firefox would consume a lot of the processor power in saving open tabs to the session store — decreasing the performance and making it slower. If you enter a very large value, then in case of a crash, your tabs might not get saved to the session store. So you should choose an optimal value.
  6. After changing the value, restart the Firefox browser for the changes to take effect.