The latest articles on DEV Community by Kaprojennoe (@kaprojennoe). https://dev.to/kaprojennoe https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4176898%2F10023737-4e47-4420-8cd7-df74af8af25d.jpg https://dev.to/kaprojennoe en Kaprojennoe Sun, 11 Oct 2026 11:22:27 +0000 https://dev.to/kaprojennoe/spending-fewer-llm-calls-in-an-ad-hiding-chrome-extension-from-76-to-22-checks-per-page-3okp https://dev.to/kaprojennoe/spending-fewer-llm-calls-in-an-ad-hiding-chrome-extension-from-76-to-22-checks-per-page-3okp <blockquote> <p>Disclosure: this article was written by an AI assistant on behalf of AdShy's developer, Kaprojennoe, at his request, from his release notes and test data. He reads the comments too.</p> </blockquote> <p>AdShy is a Chrome MV3 extension by indie developer Kaprojennoe. It hides ad blocks on two levels:</p> <ul> <li>local rules for labelled ads;</li> <li>an opt-in check for unlabelled "maybe-ads" by the Jev classifier model (by TypeSafe), called through OpenRouter.</li> </ul> <p>Version 0.1.22 worked, but it spent about 7.6 LLM checks per page. The free 200/day quota ran out after about 27 pages.</p> <p>What changed in 0.1.23:</p> <ul> <li> <strong>Per-page cap of 6.</strong> Strong signals and on-screen blocks go first.</li> <li> <strong>Lazy candidates.</strong> Off-screen blocks wait until the reader scrolls near them.</li> <li><strong>No checks on HTTP ≥400 pages.</strong></li> <li> <strong>Per-domain backoff.</strong> After 8 or more "not an ad" answers and 0 "ad" answers in 24 h, the cap drops to 2.</li> <li> <strong>Pre-filter.</strong> Same-site house promos, sticky elements with no other signal, and srcless or known-embed iframes are never sent.</li> <li> <strong>Menus are excluded.</strong> Text links in site menus are never candidates.</li> </ul> <p>Results on a live 40-site run (34 reachable):</p> <div class="table-wrapper-paragraph"><table> <thead> <tr> <th></th> <th>0.1.22</th> <th>0.1.23</th> </tr> </thead> <tbody> <tr> <td>AI checks / page</td> <td>7.6</td> <td>2.2</td> </tr> <tr> <td>Visible ad iframes</td> <td>8</td> <td>0</td> </tr> <tr> <td>False positives (manual)</td> <td>1</td> <td>0</td> </tr> <tr> <td>Cost / 1000 page views</td> <td>~$0.14–0.18</td> <td>~$0.04</td> </tr> </tbody> </table></div> <p>Note: 0.1.23 is in Chrome Web Store review at the time of writing; the store currently serves 0.1.22.</p> <p>One gotcha: a site's <code>!important</code> utility classes (<code>.d-block-lg</code>) overrode the hiding CSS. The fix was an id-weight selector in the extension stylesheet.</p> <p>Try it: <a href="https://adshy.asistbot.ru/" rel="noopener noreferrer">https://adshy.asistbot.ru/</a> (demo: <a href="https://adshy.asistbot.ru/demo" rel="noopener noreferrer">https://adshy.asistbot.ru/demo</a>). Install from the Chrome Web Store: <a href="https://chromewebstore.google.com/detail/dlnojfboliachccapaogiilmjopniohl" rel="noopener noreferrer">https://chromewebstore.google.com/detail/dlnojfboliachccapaogiilmjopniohl</a> . Privacy details: <a href="https://adshy.asistbot.ru/privacy" rel="noopener noreferrer">https://adshy.asistbot.ru/privacy</a></p> <p>AdShy is an independent project and is not affiliated with TypeSafe, OpenRouter or Google.</p> ai chrome extensions javascript