Examine source code of Gen Search

{
  "manifest_version": 3,
  "name": "Gen Search",
  "description": "This extension allows you to quickly search AppFoundry, Developer Forums, Jira, Product Ideas Lab, and Resource Center",
  "version": "1.3.0.0",
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "will.apple.genesys@gmail.com",
      "strict_min_version": "109.0"
    }
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+G"
      },
      "description": "Launch the Gen Search tool on the current page."
    }
  },
  "icons": {
    "16": "res/icon16.png",
    "32": "res/icon32.png",
    "48": "res/icon48.png",
    "128": "res/icon128.png"
  },
  "action": {
    "default_popup": "view/popup.html"
  }
}