> Also possible (but unlikely) is that Firefox doesn't support some certain thing, the absence of which might corrupt some state or data (error handling ain't e

> Also possible (but unlikely) is that Firefox doesn't support some certain thing, the absence of which might corrupt some state or data (error handling ain't exactly a thing javascript land, unfortunately. Considering that it works with current Edge (which hasn't switched to Blink, yet), it's unlikely, as you say.