Examine source code of SelectText

{
  "manifest_version": 3,
  "name": "SelectText",
  "description": "Select smarter, not harder",
  "version": "0.3.2",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "host_permissions": [],
  "author": "rxliuli",
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "96": "icon/96.png",
      "128": "icon/128.png"
    }
  },
  "homepage_url": "https://rxliuli.com/project/selecttext/",
  "web_accessible_resources": [
    {
      "resources": [
        "/lib/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "selecttext@rxliuli.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.google.com/?olud"
      ],
      "js": [
        "content-scripts/google-image-search.js"
      ]
    }
  ]
}