When I tried the tool out I found that there is no way to move the floating panel down from the top of the screen which is a non-starter in responsive mode. You can't move the panel to inspect and tweak the elements and this is a huge problem when you're trying to tweak your responsive screens.

So I took the time to make a video showing the problem and asking questions about what to do in that scenario. I saw that the video has been watched. But I have not heard back from anyone. I'm hoping to get an answer soon on my issue.

If the floating box cannot be moved vertically, then it's a serious problem.