Examine source code of Multi-Search Highlighter

{
  "manifest_version": 2,
  "name": "Multi-Search Highlighter",
  "version": "1.0",
  "description": "Search and highlight multiple words/phrases on a webpage",
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Multi-Search"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/search48.png",
    "96": "icons/search96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d6ed132-d27c-447d-aa00-cce8f65c2570}"
    }
  }
}