Suggestack

This a web extension suggests substacks based on the substack you are viewing. It takes the title, subtitle, first, second and last paragraph and finds how common the individual words are in the Google Books Ngram Dataset and how common it is in the substack. Using this information it finds key words to help it find a search phrase. It adds the search results for this phrase in other substack article to the end of the page. The extension uses previous titles of substack you read to influence the key words it uses.

Screenshots from Chrome Web Store