MarkUp.io works on almost all browsers (we've not found one it doesn't work on yet!). This includes the big ones like Firefox, Safari, and Edge. To take full advantage of MarkUp.io, we'd recommend using Google Chrome, where you can quickly create and manage your Website MarkUps from our handy extension.
Our extension gives you the power to instantly create a Website MarkUp, or jump directly to ongoing review processes in just a few clicks. Installing our extension also improves the general performance of MarkUp.io and generates automatic screenshots in all your Website MarkUp comments.
If you'd like to learn more about the MarkUp.io Chrome extension, please check out our article here.