Examine source code of DM Faster

{
  "manifest_version": 3,
  "name": "DM Faster",
  "version": "0.3.303",
  "description": "Run Instagram, Facebook, and LinkedIn outreach from your own logged-in browser.",
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "alarms",
    "cookies"
  ],
  "host_permissions": [
    "https://www.instagram.com/*",
    "https://www.facebook.com/*",
    "https://web.facebook.com/*",
    "https://www.linkedin.com/*",
    "https://app.dmfaster.com/*",
    "https://dmfaster.com/*"
  ],
  "action": {
    "default_title": "DM Faster",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "worker-protocol.generated.js",
      "background.js"
    ]
  },
  "externally_connectable": {
    "matches": [
      "https://dmfaster.com/*",
      "https://app.dmfaster.com/*"
    ]
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*",
        "https://web.facebook.com/*"
      ],
      "js": [
        "facebook-listener-main.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.facebook.com/*",
        "https://web.facebook.com/*"
      ],
      "js": [
        "facebook-listener-bridge.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://www.instagram.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://www.facebook.com/*",
        "https://web.facebook.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://dmfaster.com/*",
        "https://app.dmfaster.com/*"
      ],
      "js": [
        "site-bridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "dm-faster@dmfaster.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personalCommunications",
          "personallyIdentifyingInfo",
          "websiteActivity",
          "websiteContent"
        ]
      }
    }
  }
}