Why doesn't the Todoist app from Firefox Marketplace allow creating an account?
I installed the Todoist app from Firefox Marketplace (https://marketplace.mozilla.org/) on my Android phone, and opened it, only to discover that I had to go to the non-mobile version of the todoist.com web site to create an account.
The sign-up form only has four fields, so displaying them on mobile devices shouldn't be a big problem.
I hadn't used Todoist previously, so I didn't already have an account. I found the Todoist app because it was featured on the Firefox Marketplace. Having to go to a non-mobile site definitely broke the "mobile app" experience for me.
we're very sorry for the inconvenience, this is still an unfinished project in early alpha phase. We will release our official Android and iOS app later this month and they will allow you to sign up directly through the app.
For now, you can use our mobile site http://todoist.com/m or a variety of third-party apps: http://todoist.com/mobile