Examine source code of OmniDefend MFA Extension

{
  "name": "OmniDefend MFA Extension",
  "short_name": "OD MFA",
  "description": "Use OmniDefend's multi-factor authentication (MFA) features (non-FIDO device).",
  "version": "2.1.2.22192",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{000c019c-ed96-40e5-84ad-c88f5690b13d}",
      "strict_min_version": "58.0"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "common.js",
      "extApi.js",
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "nativeMessaging",
    "tabs",
    "https://*/*",
    "http://*/*",
    "file:///*"
  ],
  "web_accessible_resources": [
    "communication.html",
    "common.js",
    "communication.js",
    "extApi.js"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*",
        "file:///*"
      ],
      "js": [
        "common.js",
        "extApi.js",
        "contentscript.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ]
}