MrMagoo
Chicken
I personally use a HOSTs file(from SomeoneWhoCares). Combine that with uBlock and Ghostery and you've got a pretty decent way to speed things up. You can also use a user agent switcher on desktop to identify as mobile. Mobile pages generally have less junk in them, because phones can't handle all of that stuff.
If that's still not enough, your computer is a potato and you just need a new one.
If that's still not enough, your computer is a potato and you just need a new one.