Custom CSS by Denis

Minimal and secure way to add custom CSS per-domain

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "__MSG_extension_name__",
  "short_name": "__MSG_extension_short_name__",
  "version": "1.2.0",
  "default_locale": "en",
  "description": "__MSG_extension_description__",
  "icons": {
    "16": "src/icons/16.png",
    "48": "src/icons/48.png",
    "128": "src/icons/128.png",
    "256": "src/icons/256.png"
  },
  "background": {
    "service_worker": "src/background/index.js",
    "type": "module"
  },
  "action": {
    "default_popup": "src/popup/index.html"
  },
  "optional_host_permissions": [
    "http://*/",
    "https://*/"
  ],
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ]
}