Double click on the value 50 (or whatever value is there currently) and change it to something lower such as 5.įor Firefox 1.5 and above, you can also look at another configuration variable browser.

Type about:config in the Firefox address barģ. We usually won’t surf more than 5 of the websites we previously surfed before, and there is really no need to store more than that in the session which can clog up memory as they grow.Ģ. the maximum number of URLs you can traverse purely through the Back/Forward buttons. _entries determines the maximum number of pages in the browser’s session history, i.e.