Examine source code of Keep Downloading

{
  "manifest_version": 2,
  "name": "Keep Downloading",
  "version": "1.0.0",
  "permissions": [
    "downloads"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "94.0"
    }
  }
}