Windows 8.1 Firefox 102.0.1 Clean install with a brand new profile Noodling around about:config I discovered that the boolean value browser.sessionstore.enabled '''''does not exist.''''' Interestingly though, it's numerical partner browser.sessionstore.interval '''''does exist''''' and was set to 15000. (15000 miliseconds = 15 seconds) I was planning to increase this interval significantly. However... It is my understanding that browser.sessionstore.enabled must be set to true for browser.sessionstore.interval to have any effect. So what gives? Why is there a browser.sessionstore.interval set to 15000 when the prerequisite browser.sessionstore.enabled does not even exist?