I suspect it being Chrome only is one of the reasons you receive minimal responses here. At least, for me -- I only have FF installed, so I can't test for you. I imagine a lot of the HN user base is similar, due to FF's target demographic.
Thus far my time is better spent elsewhere but the code is open source and a couple of people have expressed interest in trying a port. (https://github.com/tconfrey/BrainTool)