WebExtension manifest Error ,No install.rdf or manifest.json found

I am new to Firefox webextension development. I used an example project from git hub to get used to with the concept. “https://github.com/mdn/webextensions-examples/blob/master/open-my-page-button” copied this project as it is and tried to upload it on AMO. But every time I upload the zip file, it gived me 2 errors.

No install.rdf or manifest.json found , Add-on missing manifest.

What am I doing wrong?

Hmm. I can clearly see a manifest.json in that source. Just a guess, but you wouldn’t happen to be putting everything under a subdirectory in the archive you upload? It has to be at the top level to work properly.

If that’s not it, then I don’t know.

thanks @ddawson , problem is I haven’t packed the app properly with webrt… I will be great if I can get a video tutorial on how to use Webrt …