&quot;op&quot; is Arc&#x27;s idiom for web request type, so that attribute makes it easy for a scraper to tell what kind of page it&#x27;s looking at. We added it for a Chrome extension we wrote to help with moderation.<p>One of these years I want to open-source a stripped-down version of that Chrome extension, or better still make it an optional JS client that people can opt into. It&#x27;s handy for browsing HN, if you like keyboard shortcuts and don&#x27;t mind spawning tabs. Anybody know if there&#x27;s a way for regular JS to spawn tabs, if the user is willing to give it the right permissions?