I often work with this add-on. It’s first class because it brings what I need. Runs technically flawless.

Why I can not move created rectangle?

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Worked fine and met my expectations, but doesn't work anymore. As I click the icon, nothing happens. I removed it and reinstalled without change. What should I do? Regards, Marc

A really handy addition allowing for improved design of web pages.

This extension is absolutely invaluable. It helps me figure out so many elements on a screen as I design websites.