Examine source code of Persistent Text Editor

{
  "manifest_version": 2,
  "name": "Persistent Text Editor",
  "version": "1.0.1",
  "description": "Edit any text on any website with persistent storage across page reloads",
  "permissions": [
    "storage",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Persistent Text Editor"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "persistent-text-editor@addon.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}