Normally when things are quoted, it helps to add everything that relates to what you are quoting, rather than just one sentance. Context is important.
We cannot support Linux in a legal way. So the answer is: No support for Linux
Now that it is put in context, we see that it's not that they aren't
willing to support it, it's just that they aren't
allowed to support it.
But knowing the linux community, they'll take it upon themselves to make a addon for linux that will get it to work. You'll also notice they barely support Firefox, probaly for similar reasons. I'm sure someone of the Firefox community will create an addon that will allow it to work better in Firefox as well. That's how things work, at least that's what I've witnessed anyways.