Examine source code of pouch web extension

{
  "name": "pouch web extension",
  "description": "save links to pouch with one click.",
  "version": "2.0.0",
  "manifest_version": 2,
  "homepage_url": "https://pouch.lucashmsilva.com",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "pouch web extension",
    "default_icon": {
      "48": "logo48.png",
      "96": "logo96.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "48": "logo48.png",
    "96": "logo96.png"
  },
  "permissions": [
    "<all_urls>",
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pouch-web-extension@lucashmsilva.com"
    }
  }
}