Opera and Firefox are failing me.

Please look at this screenshot, Firefox is complaining that " it's not an image that I am trying to upload"

Is it possible that there's a problem between dtube platform and Steemit platform?
I haven't been doing anything about my Steemit account, for the dtube preparations.

And I'm only able to upload pictures with an application, this blog post is done with the great @partiko app.

I wish that there would be an android app for this.
I tried to use the Dtube beta app from the Google play store, but nothing has worked so far.