Updated Fetching pages with WebDriver (markdown)

Fetching-pages-with-WebDriver.md

@@ -30,4 +30,4 @@ The URL for the WebDriver interface is set with the `WEBDRIVER_URL` environment
 * Lower the number of workers (make it configurable per backend?) 10 is too many (is it?), but this is totally fine for requests/plaintext
 * Some kind of dom-wait-until-fully loaded or other
 * Handle failures better (better feedback so we know if its from chromedriver, or from the website)
-* Save last screenshot?
+* Save last screenshot? _(This extends to saving an entire page screenshot, abstracting out the handler for diff-management, then supplying an image-diff handler)_