FF 57 surely is faster then previous version.
Noscript still working to make new version compatible with FF 57.
Although the default FF57 is already somewhat secure, you can make it more secure if you tinker with about:config or prefs.js/user.js.
You can also disable all those unneeded feature build-in plugins such as Pocket, Web Compat, Form Autofill, Follow-on Search Telemetry etc.
Chrome for me is still a joke web browser. Straight throw it into the dustbin.
The New Mozilla Firefox, Firefox Quantum