Examine source code of Mask Network

{
  "name": "Mask Network",
  "version": "2.11.4",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "downloads",
    "webNavigation",
    "activeTab",
    "tabs"
  ],
  "optional_permissions": [
    "<all_urls>",
    "notifications",
    "clipboardRead"
  ],
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "dashboard.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "16x16.png",
    "48": "48x48.png",
    "128": "128x128.png",
    "256": "256x256.png"
  },
  "browser_action": {
    "default_popup": "popups.html"
  },
  "homepage_url": "https://mask.io",
  "description": "The portal to the new & open Internet. Send encrypted message and decentralized Apps right on top of social networks.",
  "web_accessible_resources": [
    "js/*",
    "*.svg",
    "*.png",
    "*.css"
  ],
  "content_security_policy": "script-src 'self' 'wasm-eval'; object-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e57e2ae-3e13-4d5d-9243-6159219852a6}"
    }
  }
}