Examine source code of Media Converter and Muxer - Audio Tools

{
  "name": "Media Converter and Muxer - Audio Tools",
  "description": "Easy to use video and audio converter and muxer",
  "author": "InBasic",
  "version": "0.2.2",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "nativeMessaging",
    "downloads",
    "http://127.0.0.1/"
  ],
  "homepage_url": "https://add0n.com/media-converter.html",
  "icons": {
    "16": "data/icons/16.png",
    "19": "data/icons/19.png",
    "32": "data/icons/32.png",
    "38": "data/icons/38.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  },
  "background": {
    "persistent": false,
    "scripts": [
      "common.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "data/icons/16.png",
      "19": "data/icons/19.png",
      "32": "data/icons/32.png",
      "38": "data/icons/38.png",
      "48": "data/icons/48.png",
      "64": "data/icons/64.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ff128a1-c286-4e73-bffa-9ae879b244d5}",
      "strict_min_version": "58.0"
    }
  }
}