@ivanjermakov I know: it's a bummer that it doesn't work on mobile. We initially _did_ make it work (and responsive), but we ran into performance/memory issues. This is related to how much memory can be allocated on mobile devices, and since we open multiple iframes, it caused a lot of problems.

We have a specific plan on making this work on mobile, but for this initial version, we decided that making it limited to Desktop was okay (since, realistically, people who are doing frontend responsive testing, are most likely doing it on a wider display).