Examine source code of Sponge Mock

{
  "name": "Sponge Mock",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Allows users to quickly convert regular text to a sarcastic format",
  "icons": {
    "48": "icons/48-spongemock.png",
    "96": "icons/96-spongemock.png",
    "128": "icons/128-spongemock.png"
  },
  "browser_action": {
    "default_icon": "icons/48-spongemock.png",
    "default_title": "Sponge Mock",
    "default_popup": "src/popup.html",
    "browser_style": true
  }
}