The setting for a specific number of days to save History was removed from Firefox several versions ago. Why? Too much History was slowing the loading time for Firefox and sometimes making Firefox sluggish. Current versions '''''automatically''''' determine how much History to save based on your system's resources (RAM, etc.). It is a complex algorithm, and though I have seen some try to experiment with a few settings, the results were generally not very successful. '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.''' ------------------------- Not related to your question, but... You need to update some plug-ins: *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/ *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox] *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]