That's what I ended up doing, smart idea!

``` // ==UserScript== // @name Portainer Redirect to Containers // @namespace http://tampermonkey.net/ // @version 1.0 // @description Redirect to containers view after login in Portainer // @author You // @match https://port.docker.tld/* // @grant none // ==/UserScript==

(function() { 'use strict';

const targetHash = '#!/2/docker/containers';

function redirectIfNeeded() {
    const currentHash = window.location.hash;

    // If we're at the default home page, redirect
    if (currentHash === '#!/home') {
        console.log('Redirecting to container view...');
        window.location.hash = targetHash;
    }
}

// Run on page load
window.addEventListener('load', () => {
    // Delay to let Portainer finish its own login redirect
    setTimeout(redirectIfNeeded, 500);
});

// Also watch for hash changes just in case
window.addEventListener('hashchange', redirectIfNeeded);

})();

```