Disable password manager:

// Disable password saving:
lockPref("signon.autofillForms", false)
lockPref("signon.rememberSignons", false)

Disable updates:

// disables autoupdates & updates for apps, search engines, extensions
pref("app.update.enabled", false);
pref("browser.search.update", false);
pref("extensions.update.enabled", false);
pref("app.update.autoUpdateEnabled", false);
pref("extensions.update.autoUpdateEnabled", false);
pref("extensions.update.autoUpdateDefault", false);

1. Go to about:config in the address bar.
2. Set the option browser.privateWindowSeparation.enabled to false.