Examine source code of Download by Internet

{
  "manifest_version": 2,
  "version": "0.1.4",
  "name": "Download by Internet Download Manager",
  "description": "__MSG_description__",
  "default_locale": "en",
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "homepage_url": "https://add0n.com/download-by.html?from=idm",
  "permissions": [
    "storage",
    "notifications",
    "webRequest",
    "webRequestBlocking",
    "nativeMessaging",
    "contextMenus",
    "downloads",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "webext.js",
      "termlib_parser.js",
      "config.js",
      "background.js"
    ]
  },
  "browser_action": {},
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b950bef5-a19f-4c63-8cae-b8be4a1ba653}"
    }
  }
}