adblocking proxy

I'm a user of several modern browsers and I don't like spam. So I install adblockers, like [ublock origin](https://addons.mozilla.org/ca/firefox/addon/ublock-origin/?src=search) . But you have to install extensions in every browser you have and the plugins are not for term browsers (like [links](https://en.wikipedia.org/wiki/Links_%28web_browser%29)) . So the question is if is there any software outhere acting as central adblocker I thought in adblocking proxy. Ideally, it could be use EasyList or so for blocking ads, but it could be use DNS blocking directly and spamassassin or some AI for determining heuristically what is and what is not advertising. Ideally, I would like to configure to remove all ads and add some text according to user preferences: weather information, MOTD (message of the day), etc. If there is no such software is it difficult to program in any programming language?