Examine source code of Word Highlighter

{
  "manifest_version": 2,
  "name": "Word Highlighter",
  "description": "Create a list of words and phrases. See them highlighted on every page you visit.",
  "version": "1.7.3",
  "permissions": [
    "storage",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "js/lib.js",
      "scripts/background-script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/imports.js",
        "js/lib.js",
        "scripts/content-script.js"
      ],
      "css": [
        "css/wordhighlighter.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "32": "icons/icon-32.png"
    },
    "default_title": "Word Highlighter",
    "default_popup": "html/mainDialog.html"
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "applications": {
    "gecko": {
      "id": "{bec55136-0785-4dbc-bb76-fab9ba596c11}"
    }
  }
}