ColourBlind Simulation tool for developers

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "ColourBlind Simulation tool for developers",
  "description": "Allows web developers to experience their website through the perspective of colourblind individuals. Works for any website.",
  "version": "0.0.0.1",
  "manifest_version": 3,
  "icons": {},
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "filter.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup.html"
  }
}