Check that you haven't set multiple home pages. You can find the home page setting here: *Tools > Options > General > Startup: Home page *https://support.mozilla.org/kb/How+to+set+the+home+page Firefox supports multiple home pages separated by '|' (pipe) symbols. ---- If you do not keep changes after a restart or otherwise have problems with preferences, see: *http://kb.mozillazine.org/Preferences_not_saved