Examine source code of ISL Word Assistant

{
  "manifest_version": 2,
  "name": "ISL Word Assistant",
  "version": "1.1",
  "description": "Highlights supported ISL words and shows corresponding ISL videos.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "https://jestinjoy.github.io/ISLDictionaryExt/words.json"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{43c4fb4b-1b5d-4d60-acb3-c958a0e47911}"
    }
  }
}