Examine source code of Paperpod

{
  "name": "Paperpod",
  "version": "0.0.4",
  "description": "Convert any article on the web to podcasts!",
  "icons": {
    "16": "assets/logo_16.png",
    "32": "assets/logo_32.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@paperpod.fm",
      "strict_min_version": "42.0"
    }
  },
  "permissions": [
    "tabs",
    "storage",
    "management",
    "https://paperpod.fm/*"
  ],
  "background": {
    "scripts": [
      "dist/background/fetch_token.js"
    ]
  },
  "browser_action": {
    "default_popup": "dist/index.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description": "Save article to Paperpod"
    }
  }
}