4 items
Intercept and modify network requests: headers, query params, delay, response body, custom script/CSS injection. This extension helps in building rules(conditions) which when met will help in 1. redirect/block http requests 2. delay response 3. add/modify/delete request/response http headers 4. add/modify/delete http query parameters 5. modify response 6. Inject script or styles
rating_count is the Chrome Web Store ratings count, not a written-review count.