Examine source code of Text-to-Speech Reader Pro

{
  "manifest_version": 2,
  "name": "Text-to-Speech Reader Pro",
  "version": "1.0",
  "description": "Read selected text aloud with adjustable voice, speed, and pitch.",
  "browser_action": {
    "default_icon": {
      "64": "icon64.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{024a974b-dbe5-4d4c-b141-83be0ffea8fa}",
      "strict_min_version": "119.0"
    }
  }
}