Sigh. Yet another sans-serif font family.

Yes, they are easier to design, and easier to parameterize, which is nice for you, the designer. But they are not nice for me, the reader. Using a sans font says to me that your comfort is more important than mine, and that your time is worth more than mine and everyone else's, combined.

In Firefox, I have disabled web fonts, and use Libertine everywhere. That choice is denied to me in Firefox on my phone.