Examine source code of Edit Anything any website

{
  "manifest_version": 2,
  "name": "Edit Anything",
  "version": "0.3",
  "browser_action": {
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "bg.js"
    ],
    "persistent": true
  },
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2c7d0f98-20cd-4ff6-97ce-855a3efbb25d}"
    }
  }
}