manifest.json

{
    "manifest_version": 2,
    "name": "Link Checker",
    "version": "1.0",
    "description": "Check for broken links on a page.",
    "permissions": [
      "activeTab",
      "webRequest",
      "<all_urls>",
      "storage"
    ],
    "browser_action": {
      "default_popup": "popup/popup.html",
      "default_icon": {
        "16": "icons/icon-16.png",
        "48": "icons/icon-48.png",
        "128": "icons/icon-128.png"
      },
      "default_title": "Link Checker"
    },
    "icons": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    },
    "background": {
      "scripts": ["background.js"]
    },
    "content_scripts": [
      {
        "matches": ["<all_urls>"],
        "js": ["content.js"],
        "run_at": "document_idle"
      }
    ],
    "web_accessible_resources": [
      "popup.css"
    ]
  }