Go with Brave on mobile (https://www.brave.com/). They've got an ad-blocker built in.
The single best improvement I've made to my mobile browsing experience in years wasn't getting a new faster phone, it was installing Brave and disabling javascript.
[1] https://addons.mozilla.org/en-US/android/addon/toggle-javasc...
Brave is a Chrome fork so for those of us who prefer Chrome it's a better option (for now anyway).
then use your 10 top websites with whitelisted javascript access on firefox mobile, and full javascript on chrome and came back to say which one was faster.