Transparent proxy with filtering content(content injection).

RouterOS Beginner Basics
1

I must put iframe/JS in every HTTP-page transfered via my Hotspot.
How?

2

RouterOS currently doesn’t offer content injection in the Hotspot

3

Thanks.
Can I use RouterOS + Openwrt@Metarouter for implement CoovaChilli(hotspot+simple webserver) + Privoxy(content injection) + iptables on RB711?