user_pref("accessibility.typeaheadfind.flashBar", 0);
user_pref("accessibility.typeaheadfind.prefillwithselection", true);
user_pref("browser.backspace_action", 2);
user_pref("browser.bookmarks.restore_default_bookmarks", false);
user_pref("browser.newtab.url", "about:blank");
user_pref("browser.search.suggest.enabled", false);
user_pref("browser.selfsupport.url", "");
user_pref("browser.showQuitWarning", true);
user_pref("browser.startup.homepage", "about:blank");
user_pref("browser.tabs.animate", false);
user_pref("browser.tabs.closeWindowWithLastTab", false);
user_pref("browser.tabs.warnOnClose", false);
user_pref("datareporting.healthreport.uploadEnabled", false);
user_pref("network.cookie.cookieBehavior", 3);
user_pref("network.cookie.lifetimePolicy", 2);
user_pref("network.http.referer.spoofSource", true);
user_pref("network.http.referer.trimmingPolicy", 2);
user_pref("network.http.referer.XOriginPolicy", 2);
user_pref("toolkit.telemetry.enabled", false);

user_pref("accessibility.typeaheadfind.flashBar", 0);
user_pref("accessibility.typeaheadfind.prefillwithselection", true);
user_pref("browser.backspace_action", 2);
user_pref("browser.bookmarks.restore_default_bookmarks", false);
user_pref("browser.newtab.url", "about:blank");
user_pref("browser.readinglist.enabled", false);
user_pref("browser.search.suggest.enabled", false);
user_pref("browser.selfsupport.url", "");
user_pref("browser.showQuitWarning", true);
user_pref("browser.startup.homepage", "about:blank");
user_pref("browser.tabs.animate", false);
user_pref("browser.tabs.closeWindowWithLastTab", false);
user_pref("browser.tabs.warnOnClose", false);
user_pref("datareporting.healthreport.uploadEnabled", false);
user_pref("loop.enabled", false);
user_pref("network.cookie.cookieBehavior", 3);
user_pref("network.cookie.lifetimePolicy", 2);
user_pref("network.http.referer.spoofSource", true);
user_pref("network.http.referer.trimmingPolicy", 2);
user_pref("network.http.referer.XOriginPolicy", 2);
user_pref("readinglist.scheduler.enabled", false);
user_pref("toolkit.telemetry.enabled", false);

Disable a few unused features
firefox: Disable a few unused features
