This is a periodic table of elements that allows interaction a bit like Google Maps or similar. Zooming in enlarges the table and reveals more information.
I don't know my way around the app but comparing Firefox with Chrome I find two basic problems which are not present in Chrome.
Clicking on row or column does not generate highlights and filters don't work; nothing happens! The filter box X close doesn't operate either. I'm using FF 49.0.2 and 'about:config' is out of the box. I hope this lack of response in FF isn't merely down to my setup!
Yes, seems to be working now! I say 'seem' only because I haven't explored it thoroughly. The young aspiring chemist in the family will take it for a test run.
I originally wrote it as an entry for this year's 10K Apart contest (https://a-k-apart.com/gallery/Zoomable-Periodic-Table). I've now added some new features and refined it a bit.