You need something like a timer for FireFox, which will show the elapsed time since the page was updated. Can I do this?

    1 answer 1

    You just need to write UserJS

    // ==UserScript== // @include * // ==/UserScript== start=(new Date()).getTime(); window.setInterval(function(){ document.title=Math.floor(((new Date()).getTime()-start)/1000); }, 340); 

    Install the extension GreaseMonkey , save the code above to the *.user.js file, open it via FireFox and agree with everything.