Examine source code of My Space Count

{
  "action": {
    "default_popup": "popup.html",
    "default_icon": "images/128icon.png",
    "default_title": "Simple Space Count"
  },
  "description": "Simple Space Count is known as the space bar clicker is an online tool to count the total number of clicks you have performed.",
  "icons": {
    "38": "images/38.png",
    "48": "images/48.png",
    "128": "images/128icon.png"
  },
  "name": "Simple Space Count",
  "manifest_version": 2,
  "version": "2.3.3",
  "browser_specific_settings": {
    "gecko": {
      "id": "{10101be2-5c00-4017-9bc9-7f0ec8a88cc1}"
    }
  }
}