Hmm. Maybe you were thinking about elemental mercury vs methyl mercury? That’s a case where the danger (at least through ingestion) depends greatly on the format.

I didn’t know they’d be able to tap into the Firefox profiling tools, that’s neat! Probably great data to have as they get into debugging of more complex websites.

This view reminds me that he’ll have a new steering wheel to learn. I don’t know how these guys can rewire their brains like that, I can barely use a computer mouse that’s 10% different from my usual one…