There's a built-in blocker-mode that blocks the ads and tracking hosts, and noscript-mode that disables JavaScript execution.
You can toggle these modes with the help of auto-mode (read on it there), so you won't need to manage modes manually.
Some additional tracking and ad-blocking features (like recent Intelligent Tracking Prevention from WebKitGTK) are in progress too, so stay tuned :)
Alright, point-by-point:
force-https-mode.proxy-mode?All in all, we're getting there :)