So just to confirm, in the General panel of the Options page, you are setting "When Firefox starts: Show a blank page" And when you close the Options page and open it again, your setting is still there. But when you close Firefox and start it up again, it changed back to: "When Firefox starts: Show my home page" There are a number of possible reasons for Firefox to lose your settings changes between session. Some software that is designed to protect you from unwanted changes actually blocks you from making wanted changes. This includes Advanced SystemCare, and some other utility/privacy/security software with a "browsing protection" or "home page protection" feature. This article has other possible explanations: [[How to fix preferences that won't save]]. ''If you find that Firefox doesn't remember the change between visits to the Options page:'' you may have a different issue, such as a typically unwanted program named SearchProtect that needs to be removed from the Windows Control Panel, or an "autoconfig" file that locks your startup setting. We can help you explore that further if this seems to be the behavior.