Examine source code of Pinterest Downloader

{
  "manifest_version": 3,
  "name": "Pinterest Downloader",
  "version": "1.4",
  "description": "Perfectly embedded download tool in Pinterest page, one-click to download videos and batch download images.",
  "icons": {
    "64": "icons/64.png"
  },
  "action": {
    "default_icon": {
      "64": "icons/64.png"
    },
    "default_title": "Pinterest Downloader"
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "default_icon": "icons/64.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "storage",
    "downloads",
    "tabs",
    "declarativeNetRequest"
  ],
  "content_scripts": [
    {
      "all_frames": false,
      "css": [
        "css/pinterest.css"
      ],
      "js": [
        "js/jquery-1.10.2.min.js",
        "js/arrive.min.js",
        "js/common.js",
        "js/pinterest.js"
      ],
      "matches": [
        "https://*.pinterest.com/*"
      ],
      "run_at": "document_end"
    },
    {
      "all_frames": true,
      "js": [
        "js/jquery-1.10.2.min.js",
        "js/common.js",
        "js/iframe.js"
      ],
      "matches": [
        "https://snapany.com/pinterest*"
      ],
      "run_at": "document_start"
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "pinterest984437",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "js/common.js",
        "icons/*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c6dfd588-13c0-498b-87d7-f0a042c52516}"
    }
  }
}