Missing manifest.json when uploading Firefox Add-on to AMO
<p>I'm unable to upload my firefox extension using the <a href="https://addons.mozilla.org/en-US/developers/addon/submit/distribution" rel="noreferrer" title="form provided by mozilla.">form provided by mozilla</a>. I'm constantly getting the error <code>Your add-on failed validation with 2 errors.
No install.rdf or manifest.json foundAdd-on missing manifest</code>, which is very misleading because my application <strong>has</strong> a manifest.json.</p>

<p>The manifest.json looks like this:</p>

<pre><code>{
"manifest_version": 2,
"version": 1.0,
"name": "my-extension-name",
"description": "Lorem ipsum dolor sit amet",
"background": {
   "scripts": ["js/background.js"]
},
"main": "popup.js",
"browser_action": {
  "default_icon": "img/icon_grey.png",
  "default_popup": "popup.html",
  "default_title": "loremipsum"
},
"engines": {
  "firefox": "&gt;=38.0a1"
},
"permissions": [
  "activeTab",
  "tabs",
  "background",
  "http://*/*",
  "https://*/*",
  "notifications",
  "alarms",
  "storage",
  "webRequest",
  "webRequestBlocking",
  "clipboardRead"
]
}
</code></pre>

<p>What is missing for this to work?</p>