No it doesn't. At least not with Firefox. Just use

   View --> Page Style --> No Style

But as for the other complaint elsewhere in the comments, about light gray text, unfortunately Firefox can't help with that. Normally such misguided text is countered with

   Preferences --> Content --> Colors --> override ...

but in this case the gray is unfortunately in images and not text.

And it gets even worse for the light gray text. OS X Accessibility has a setting to "Enhance Contrast". But in this case the gray is closer to white than to black, so all that "enhancing" does is make the text even lighter!

Sigh.

The interactive tool[1] needs javascript. Don't try graphing secp256k1.

[1] https://cdn.rawgit.com/andreacorbellini/ecc/0939921/interact...

I was ready to say "well, the animations and formulas need it" but no, those are static images. Meh...