[zackbloom]

Just to provide another explanation. I visited the firesize page and had no idea I was supposed to signup at all to use it. The example provides a way to append any URL to firesize.com, I assumed that was how it was used. What is the advantage of the Heroku signup?

[vanstee]

Oh gotcha. Yeah that's mainly for testing, but would be slow to use in practice since it's not behind a CDN. We'll probably start throttling that one, only for use on the homepage, but feel free to signup and use your own account for free.

[WhitneyLand]

Yes definitely, that's the first thing I tried. Those examples on the home page should work and be interactive or hackable URLs.

Don't care about CDN performance in playground mode.