Examine source code of Vocabulary.com Enhancer

{
  "manifest_version": 2,
  "name": "Vocabulary.com Enhancer",
  "short_name": "Voc.com Enhancer",
  "author": "Thor Galle",
  "description": "Translations and other useful features for vocabulary.com (unofficial)",
  "icons": {
    "16": "icons/favicon-16x16.png",
    "32": "icons/favicon-32x32.png",
    "64": "icons/favicon-64x64.png",
    "128": "icons/favicon-128x128.png"
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content/voc-adder.js"
      ],
      "css": [
        "styles.css"
      ]
    },
    {
      "matches": [
        "*://*.vocabulary.com/*"
      ],
      "js": [
        "content/misc.js"
      ]
    },
    {
      "matches": [
        "*://*.vocabulary.com/",
        "*://*.vocabulary.com/play/",
        "*://www.vocabulary.com/lists/*/practice*"
      ],
      "js": [
        "content/element-creator.js",
        "content/quiz-injector.js",
        "common.js"
      ],
      "css": [
        "styles.css"
      ]
    },
    {
      "matches": [
        "*://*.vocabulary.com/dictionary/*"
      ],
      "js": [
        "api/translate.js",
        "content/element-creator.js",
        "content/definition-injector.js",
        "common.js"
      ],
      "css": [
        "styles.css"
      ]
    },
    {
      "matches": [
        "*://*.vocabulary.com/lists/*"
      ],
      "exclude_matches": [
        "*://*.vocabulary.com/lists/*/edit"
      ],
      "js": [
        "api/translate.js",
        "content/element-creator.js",
        "content/list-injector.js",
        "common.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "permissions": [
    "contextMenus",
    "activeTab",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "notifications",
    "*://*.vocabulary.com/",
    "http://*/*",
    "https://*/*",
    "storage"
  ],
  "web_accessible_resources": [
    "icons/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{136c3870-cc04-40bc-a781-5c903ca0c381}",
      "strict_min_version": "57.0"
    }
  },
  "version": "0.7.1"
}