Except it's not because it's based on JSDOM, which isn't going to simulate any browsers with real accuracy. You're better off biting the bullet and descending into the painful world of Selenium WebDriver testing, sadly.
Clean and simple, just how I like it. Nice work on the LinkedIn importer.
Edit: Forgot to add, some more explicit privacy options would be cool. Also the "card" on the homepage (http://resume.io/{username}) seems to not be working correctly(?)
I agree. Most modern OS monospace fonts (Consolas, Monaco, Ubuntu Mono) are more than enough for any kind of programming. I don't really see the benefit of going out and trying new fonts. IMHO font size and color highlighting (color schemes?) play a much bigger role in making my work on a text editor be faster/better.
Of course, it's a matter of personal taste, I did see one guy using Arial as a font on his text editor once...