Examine source code of Replace Bangla Font

{
  "manifest_version": 2,
  "name": "Replace Bangla Sequences",
  "version": "1.0",
  "description": "Automatically replace specific Bangla sequences on web pages.",
  "permissions": [
    "activeTab",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{eac67ffe-8042-496a-8df8-141ea855fd75}"
    }
  }
}