Examine source code of Postschain

{
  "manifest_version": 3,
  "name": "Postschain",
  "version": "1.0.0",
  "description": "Postschain empowers you to securely engrave permanent, immutable posts on the blockchain.",
  "icons": {
    "16": "logo16.png",
    "32": "logo32.png",
    "48": "logo48.png",
    "128": "logo128.png"
  },
  "background": {
    "scripts": [
      "./static/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./static/js/content.js"
      ],
      "css": [
        "./static/css/content.css"
      ],
      "all_frames": false,
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "nettimes1@gmail.com"
    }
  }
}