Examine source code of Quick Image Saver

{
  "manifest_version": 3,
  "name": "Quick Image Saver",
  "description": "An extension that allows you to quickly save any image with a single click",
  "version": "0.0.2",
  "permissions": [
    "downloads",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "action/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@quick-image-saver-ext.timofei-gomziakov",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}