At some point I've realized that much of the complexity and resource requirements of web browsers comes from JavaScript. This is because every part needs to be dynamic and optimized for speed.
So a few years ago I've started to work on a web browser that intentionally doesn't implement JavaScript, instead it contains an updated set of scripts that fix and improve various websites.
I've been using this approach using a proxy server for a few years as my primary way of web browsing with good results. It uses a whitelist approach where no resources are loaded from different domains by default (the fix scripts can override it to load images from CDNs, etc.). This avoids any trackers by default.
You can find more details on the homepage of the project:
I'm currently running a fundraiser to get it really going. All the foundation blocks are there it just needs some more work. Any support is welcome.