Examine source code of Navitra

{
  "manifest_version": 2,
  "name": "Navitra",
  "version": "0.1.14",
  "description": "__MSG_ext_description__",
  "default_locale": "pt_BR",
  "icons": {
    "48": "icons/navitra_48.png",
    "96": "icons/navitra_96.png",
    "128": "icons/navitra_128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "*://*.travian.com/*",
    "*://*.travian.com.br/*",
    "*://*.travian.com.pt/*",
    "*://*.travian.net/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/navitra.png",
      "32": "icons/navitra_32.png"
    },
    "default_title": "Navitra",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "dist/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.travian.com/*",
        "*://*.travian.com.br/*",
        "*://*.travian.com.pt/*",
        "*://*.travian.net/*"
      ],
      "js": [
        "dist/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "assets/*.png",
    "assets/units/*.png",
    "assets/units/hero/*.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "navitra@local.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}