Examine source code of Code Compare Tool

{
  "manifest_version": 2,
  "name": "Code Compare Tool",
  "version": "1.0",
  "description": "Quickly compare two code snippets from the popup.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png",
    "default_title": "Compare Code"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{209901ba-34a6-4048-9d67-485424ce9532}"
    }
  }
}