@mkljczk @Vivaldi The feature is not included in Vivaldi. That references to various AI related features can be found around the browser does not mean they actually _work_, and if you check the translation playground in the page you linked to, you will find that it does not work (compare to the other browser). In this case, AFAICT from the related pages to the page you linked to, that feature requires that a component called "Optimization Guide" in Chromium works, and that is one of the AI-related components where we have disabled important parts of it (we concentrate on disabling the choke points), including that the download URL has been changed to point at one of our servers that only return "404 Not Found", thus breaking the model downloads.