Live CSS Tester

Easily inject CSS into a webpage for testing

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manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Live CSS Tester",
  "version": "2.0.0",
  "permissions": [
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "description": "Easily inject CSS into a webpage for testing",
  "devtools_page": "devtools.html",
  "icons": {
    "128": "icon128.png"
  },
  "action": {
    "default_popup": "editor.html"
  },
  "manifest_version": 3
}