Examine source code of FlashPlayer - SWF to HTML

{
  "manifest_version": 3,
  "version": "0.3.2",
  "name": "FlashPlayer - SWF to HTML",
  "description": "Open SWF links of Adobe Animate (Flash) in a pure sandboxed JavaScript emulator",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "contextMenus",
    "notifications"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "icons": {
    "16": "/data/icons/16.png",
    "32": "/data/icons/32.png",
    "48": "/data/icons/48.png",
    "64": "/data/icons/64.png",
    "128": "/data/icons/128.png",
    "256": "/data/icons/256.png",
    "512": "/data/icons/512.png"
  },
  "background": {
    "service_worker": "worker.js",
    "scripts": [
      "worker.js"
    ]
  },
  "homepage_url": "https://webextension.org/listing/flashplayer.html",
  "action": {
    "default_title": "Click to search for embedded SWF contents"
  },
  "content_scripts": [
    {
      "match_about_blank": true,
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/data/page.js"
      ],
      "css": [
        "/data/page.css"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "/data/player/ruffle/*.js",
        "/data/player/ruffle/*.wasm"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "commands": {
    "_execute_action": {},
    "search": {
      "description": "Find SWF and Open in Emulator"
    },
    "inject-ruffle": {
      "description": "Load all embedded SWF objects"
    },
    "open-empty": {
      "description": "Open Empty Emulator (Local SWF)"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{580d99ee-bcc9-47b2-a5d9-6a2c8aa855a7}",
      "strict_min_version": "128.0"
    }
  }
}