Examine source code of Asurascan Saver

{
  "manifest_version": 2,
  "name": "Asurascan Saver",
  "version": "1.0",
  "description": "Save as a .crawljob file the images of a chapter",
  "icons": {
    "234": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://beta.asurascans.com/read/*"
      ],
      "js": [
        "asurascanBeta.js"
      ]
    },
    {
      "matches": [
        "https://asura.gg/*-chapter-*"
      ],
      "js": [
        "asurascan.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{09e36240-a1b0-402f-8a7a-ecf6f29dccde}"
    }
  }
}