Examine source code of Readability Enhancer Vc

{
  "manifest_version": 2,
  "name": "Readability Enhancer",
  "version": "1.3",
  "description": "Enhances web content readability by removing distractions and allowing customization.",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{daf0f915-ff54-4f76-a6ac-32cf21313873}"
    }
  }
}