Examine source code of Quick Marker | Great

{
  "manifest_version": 2,
  "name": "QuickMarker",
  "version": "1.0",
  "description": "Highlight phrases on web pages with colors.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "<all_urls>"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "128": "icon.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "quickmarker@arman.com",
      "strict_min_version": "60.0"
    }
  }
}