Examine source code of Accessibility Vision Simulator

{
  "manifest_version": 3,
  "name": "Accessibility Vision Simulator",
  "version": "1.0",
  "description": "Simulate color blindness and visual impairments on any webpage to help developers test accessibility.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "abcdtest@test.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "cycle-filter": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Cycle through vision filters"
    },
    "reset-filter": {
      "suggested_key": {
        "default": "Alt+B"
      },
      "description": "Reset to normal vision"
    },
    "auto-preview": {
      "suggested_key": {
        "default": "Alt+C"
      },
      "description": "Start/stop auto preview cycling"
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "128": "icons/icon128.png"
  }
}