Which is a screenshot of the uBlock Origin page in the Chrome Web Store, displaying the message "This extension is no longer available because it doesn't follow best practices for Chrome extensions.": https://chromewebstore.google.com/detail/ublock-origin/cjpal...
As I understand it, HN itself automatically rewrites www.reddit.com to old.reddit.com in submitted links. This works for direct links to posts and comments, but not share links (containing "/s/" in the path) like the one for this post.