Examine source code of Batch Images Saver

{
  "name": "Batch Images Saver",
  "version": "1.1.0",
  "author": "Larissa Rosalene <lerarosalene@outlook.com>",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "icons": {
    "48": "icon-48x48.png",
    "96": "icon-96x96.png"
  },
  "permissions": [
    "downloads"
  ],
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "96": "icon-96x96.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a56cf048-0a56-49b5-a407-d67442915bb1}"
    }
  }
}