Examine source code of Quick Download Manager Extension for Firefox

{
  "name": "Quick Download Manager Extension for Firefox",
  "description": "An aria2(https://aria2.github.io/) web console integration.",
  "version": "1.23.2.1",
  "default_locale": "en",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "tabs",
    "notifications",
    "downloads",
    "contextMenus",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "common.js",
      "xhr.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "all_frames": true,
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "js": [
        "common.js",
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icons/disabled/16.png",
      "32": "icons/disabled/32.png",
      "64": "icons/disabled/64.png",
      "128": "icons/disabled/128.png",
      "256": "icons/disabled/256.png"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "256": "icons/256.png"
  },
  "homepage_url": "https://qdm.codedad.com",
  "options_ui": {
    "page": "option.html",
    "open_in_tab": true
  }
}