steps to reproduce: 1. Load marketplace-dev.allizom.org/app/kjhkj on your android tablet or mobile actual behavior: we show the zamboni 404 page which is not mobile-optimized. We should show a fireplace error page

This seems to be serving up the correct 404 on -dev now. [:krupa] can you let me know if you're still seeing the wrong error page? The page I'm seeing on Android is minimal, but does pull down fireplace resources, and seems to be mobile-friendly. I did see it earlier today come down with no style sheet attached, but talked with Jason about it and that may have been a side effect of testing they are doing on -dev with a new CDN, so probably not related to the original issue.

Try marketplace.firefox.com/a/tcfttc

Yes, I see it too, still getting the zamboni 404 on production, but no longer on dev, which makes me think that it was a recent change that hasn't made it to the production deploy yet.

Let's the use the new error page in bug 972495.

bug 972495 will fix this