Examine source code of Word Cloud Generator

{
  "manifest_version": 2,
  "name": "Word Cloud Generator",
  "version": "0.2.5resigned1",
  "description": "Generate a word cloud visualization of webpages",
  "icons": {
    "32": "icons/word-cloud-generator-32.png",
    "48": "icons/word-cloud-generator-48.png",
    "64": "icons/word-cloud-generator-64.png",
    "96": "icons/word-cloud-generator-96.png"
  },
  "applications": {
    "gecko": {
      "id": "word@cloud.generator",
      "strict_min_version": "46.0"
    }
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/word-cloud-generator-32.png",
    "default_title": "Word Cloud Generator"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "contentscript.js",
        "scripts/content-element-toggling.js",
        "vendor/scripts/d3.min.js",
        "vendor/scripts/d3-cloud.min.js",
        "scripts/word-cloud-container.js",
        "scripts/word-cloud-generator.js"
      ],
      "css": [
        "styles/content-element-toggling.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "popup/word-cloud-config.html"
  ]
}