Examine source code of HTTP-link Counter

{
  "manifest_version": 2,
  "name": "HTTP-link Counter",
  "description": "Count all links on the page, classify internal vs external, and show top domains",
  "version": "1.0.4",
  "icons": {
    "64": "icon/64.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon/64.png",
    "default_title": "HTTP-link Counter",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{745289ca-659f-4a96-ae80-eb2bd6163bd6}",
      "strict_min_version": "115.0"
    }
  }
}