A new web extension

How about making a web extension that lets you edit and share the edit of a particular homepage. The idea is to allow users to edit the DOM of a loaded page, and one can make more or less simple tools for that. Next, the extension should provide ways to package and share those edits so that other users can use them. This can then be automation things or other improvements of homepages, removal of particular contents that one does not want to be shown or whatever.
It is a way of democratizing the web, but it will of course pose huge risks since it will be easy to introduce malicious code/edits. That is something that has to be dealt with.