Examine source code of Text Twister

{
  "manifest_version": 2,
  "name": "Text Rephraser",
  "version": "1.0",
  "description": "This extension rephrases text on a page.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dc88befa-5cb9-466e-b7fb-720bb394d023}"
    }
  }
}