Honestly I wouldn't. Even if I did, there are many options for this already. I would prefer one of the long-time existing solutions (Pocket, Instapaper etc) over a brand new one.

I would encourage you to look past bookmarks. Aside from "I'll read this later", they are pretty useless

> extension that shows your bookmarks that relate to a google search

I think this is a good lead.. how/if you could monetize it is a different story though