Firefox about:config settings: browser.download.improvements_to_download_panel ;false browser.newtabpage.enabled ;false browser.pocket.enabled ;false browser.privatebrowsing.autostart ;false browser.safebrowsing.downloads.enabled ;false browser.safebrowsing.downloads.remote.enabled ;false browser.safebrowsing.enabled ;false browser.safebrowsing.malware.enabled ;false browser.tabs.animate ;false browser.tabs.warnOnClose ;false browser.urlbar.autocomplete.enabled ;false browser.urlbar.suggest.bookmark ;false browser.urlbar.suggest.history ;false browser.urlbar.suggest.openpage ;false browser.urlbar.trimURLs ;false geo.enabled ;false network.dns.disablePrefetch ;true network.http.referer.XOriginPolicy ;1 network.prefetch-next ;false network.trr.mode ;0 places.history.enabled ;false reader.parse-on-load.enabled ;false security.dialog_enable_delay ;300 widget.gtk.overlay-scrollbars.enabled ;false widget.non-native-theme.gtk.scrollbar.thumb-size ;5