CSS helper

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "CSS helper",
  "version": "2.2.0",
  "description": "Help users use and understand CSS.",
  "icons": {
    "32": "assets/shang32.png",
    "48": "assets/shang48.png",
    "128": "assets/shang128.png"
  },
  "background": {
    "service_worker": "js/background.js"
  },
  "action": {
    "default_icon": {
      "32": "assets/shang32.png"
    },
    "default_title": "CSS helper"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/shang.png",
        "images/xia.png"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "use_dynamic_url": true
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "css": [
        "css/popup.css"
      ],
      "js": [
        "js/popup.js",
        "js/chunk-vendors.js"
      ],
      "exclude_matches": [
        "https://*.xxx.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": []
}