Examine source code of CalmSignal

{
  "manifest_version": 3,
  "name": "CalmSignal",
  "version": "3.1.2",
  "description": "Privacy-first emotional awareness assistant",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1ab7545d-d1d0-4524-afce-6fa660c81fe7}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "authenticationInfo",
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "activeTab",
    "tabs",
    "scripting"
  ],
  "host_permissions": [
    "https://us.i.posthog.com/*",
    "https://www.calmsignal.app/*",
    "https://app.calmsignal.app/*",
    "https://bridge.calmsignal.app/*",
    "https://api.calmsignal.app/*",
    "https://www.google.com/recaptcha/*",
    "https://www.gstatic.com/recaptcha/*",
    "https://www.recaptcha.net/recaptcha/*",
    "https://web.whatsapp.com/*",
    "https://web.telegram.org/*",
    "https://mail.google.com/*",
    "https://outlook.office.com/*",
    "https://outlook.office365.com/*",
    "https://outlook.live.com/*",
    "https://app.slack.com/*",
    "https://facebook.com/*",
    "https://www.facebook.com/*",
    "https://x.com/*",
    "https://twitter.com/*",
    "https://threads.net/*",
    "https://reddit.com/*",
    "https://www.reddit.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://web.whatsapp.com/*",
        "https://web.telegram.org/*"
      ],
      "js": [
        "content-whatsapp.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://mail.google.com/*"
      ],
      "js": [
        "content-gmail.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://outlook.office.com/*",
        "https://outlook.office365.com/*",
        "https://outlook.live.com/*"
      ],
      "js": [
        "content-outlook.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://app.slack.com/*"
      ],
      "js": [
        "content-slack.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://facebook.com/*",
        "https://www.facebook.com/*"
      ],
      "js": [
        "content-facebook.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*"
      ],
      "js": [
        "content-twitter.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://threads.net/*"
      ],
      "js": [
        "content-threads.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://reddit.com/*",
        "https://www.reddit.com/*"
      ],
      "js": [
        "content-reddit.js"
      ],
      "css": [
        "nudge.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://bridge.calmsignal.app/*"
      ],
      "js": [
        "content-recaptcha-bridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "CalmSignal Settings"
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'; frame-src https://www.google.com https://www.gstatic.com https://www.recaptcha.net https://recaptcha.google.com https://app.calmsignal.app https://bridge.calmsignal.app"
  },
  "icons": {
    "16": "assets/icon16.png",
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "assets/*",
        "*.wasm",
        "*.mjs"
      ],
      "matches": [
        "https://web.whatsapp.com/*",
        "https://web.telegram.org/*",
        "https://mail.google.com/*",
        "https://outlook.office.com/*",
        "https://outlook.office365.com/*",
        "https://outlook.live.com/*",
        "https://app.slack.com/*",
        "https://facebook.com/*",
        "https://www.facebook.com/*",
        "https://x.com/*",
        "https://twitter.com/*",
        "https://threads.net/*",
        "https://reddit.com/*",
        "https://www.reddit.com/*"
      ]
    }
  ],
  "commands": {
    "toggle-nudges": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      },
      "description": "Toggle nudges on current page"
    }
  }
}