Checkout sdf.org there’s some good aspects of that sorta community there, they even sort of support dial up (I couldn’t find a working number though and it wasn’t worth paying the crazy prices for a proper landline)
There’s also some kinda clunky projects like wrp and txtdot that can enable old browsers (plus FrogFind) but yeah, you’ll need to be careful about your network/firewall setup.
I’m sure there must be extensions similar elsewhere but one thing I found just recently was Stop The Madness Pro on iOS which can block mouse location among plenty else (a lot of which I’m still figuring out). I think for keyboard stuff.. probably just need to get in the habit of copy/pasting from somewhere neutral :s
I’ve been chewing on doing things like self hosting a virtual browser (e.g. zen?) lately, in part to hide things like my resolution details but gosh it would suck to use most of the time.
I kinda think the best thing generally though is not to allow javascript or cookies by default, and then all the sites really get is your useragent until you decide to give them more. It’s exhausting though :T but it steers you towards the more hospitable websites which is where we should spend our energy/money anyway.