Examine source code of Ruffle - Flash Emulator

{
  "manifest_version": 3,
  "name": "Ruffle - Flash Emulator",
  "short_name": "Ruffle",
  "version": "0.3.0.26163",
  "default_locale": "en",
  "description": "__MSG_description__",
  "homepage_url": "https://ruffle.rs/",
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "https://sso.godaddy.com/*",
        "https://authentication.td.com/*",
        "https://*.twitch.tv/*",
        "https://www.tuxedocomputers.com/*",
        "https://*.taobao.com/*",
        "https://*.time4learning.com/*",
        "https://*.edgenuity.com/*",
        "https://www.chewy.com/*",
        "https://*.duosecurity.com/*",
        "https://*.tiktok.com/*",
        "https://kick.com/*",
        "https://*.dhl.com/*",
        "https://*.dhl.de/*",
        "https://mydhl.express.dhl/*",
        "https://*.costco.com/*",
        "https://*.costco.ca/*",
        "https://*.costco.co.uk/*",
        "https://*.costco.com.mx/*",
        "https://*.costco.co.kr/*",
        "https://*.costco.co.jp/*",
        "https://*.costco.com.tw/*",
        "https://*.costco.com.au/*",
        "https://*.costco.es/*",
        "https://*.costco.fr/*",
        "https://*.costco.is/*",
        "https://*.costco.com.cn/*"
      ],
      "js": [
        "dist/content.js"
      ],
      "all_frames": true,
      "run_at": "document_start"
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; script-src 'wasm-unsafe-eval' 'self'; style-src 'unsafe-inline'; connect-src *; media-src *; img-src data:;"
  },
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png",
    "180": "images/icon180.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "host_permissions": [
    "<all_urls>"
  ],
  "permissions": [
    "storage",
    "scripting",
    "declarativeNetRequestWithHostAccess"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "4399_rules",
        "enabled": true,
        "path": "dist/4399_rules.json"
      }
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b5501fd1-7084-45c5-9aa6-567c2fcf5dc6}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  }
}