There's a my submissions page here:
https://marketplace.mozilla.org/en-US/developers/submissions
Where you can resume and delete, however, it might not show your app yet.
Could you send me a copy of your manifest or a link to your manifest?
Then I can test it out file a bug on this.
Thanks
That manifest passes successfully in my dev server. Any chance you
could reset it to ISO-8859-1/latin-1 so I can see if it fails?
We've filed a bug on this and we are working on it today.
https://bugzilla.mozilla.org/show_bug.cgi?id=732438
Thanks.