Examine source code of Twitch Clip Downloader

{
  "manifest_version": 2,
  "name": "Twitch Clip Downloader",
  "short_name": "TCD",
  "version": "0.1.26",
  "description": "Easily download Twitch clips!",
  "content_scripts": [
    {
      "matches": [
        "*://*.twitch.tv/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {},
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "downloads"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{242c2204-f50c-4495-8ec1-57c9d722524a}"
    }
  }
}