You can configure the frequency at which Firefox create Session Restore points:
- Open Firefox.
- In the address bar type the following command:
- Click on the "I'll be careful, I promise..." button
- In the Filter field type:browser.sessionstore.interval
- By default the time interval is of 10 seconds (10000 miliseconds).
- You can modify it to (5000) which will thus represent an interval of 5 seconds between the saves.
- Close the about:config window and restart Firefox.