Examine source code of Highlight Keywords

{
  "manifest_version": 2,
  "name": "Highlight Keywords",
  "description": "Highlight keywords on webpage that you visited after searching for a keyword on a search engine.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "version": "1.1resigned1",
  "applications": {
    "gecko": {
      "id": "highlight-keywords-toolbarteam101@gmail.com",
      "strict_min_version": "42.0"
    }
  },
  "chrome_url_overrides": {
    "newtab": "tab.html"
  },
  "icons": {
    "128": "images/icon.png"
  },
  "browser_action": {
    "default_icon": "images/icon.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "js": [
        "mark.min.js",
        "content.min.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "images/*.png"
  ]
}