Examine source code of Universal Web Clipper

{
  "manifest_version": 3,
  "name": "Universal Web Clipper",
  "version": "1.42.0",
  "action": {},
  "background": {
    "scripts": [
      "chrome/background.js"
    ]
  },
  "icons": {
    "128": "chrome/icons/icon.png"
  },
  "commands": {
    "save-selection": {
      "suggested_key": {
        "default": "Alt+S"
      },
      "description": "Save selection"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3fbb1f97-0acf-49a0-8348-36e91bef22ea}"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "chrome/tool.html",
        "chrome/tool.js",
        "chrome/vendor.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "chrome/content_script.js"
      ]
    }
  ],
  "host_permissions": [
    "<all_urls>",
    "http://*/*",
    "https://*/*"
  ],
  "permissions": [
    "cookies",
    "activeTab",
    "storage",
    "contextMenus",
    "declarativeNetRequestWithHostAccess"
  ]
}