Examine source code of Email Link Generator

{
  "manifest_version": 2,
  "name": "Email Link Generator",
  "version": "1.0",
  "description": "Generate email links with pre-filled recipient, subject, and body",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Email Link Generator"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3880ef0e-8a4c-4270-83ed-e8eb127530af}"
    }
  }
}