Examine source code of Multiple Choice Checker

{
  "manifest_version": 2,
  "name": "Multiple Choice Checker",
  "description": "Addons that will make it easier to check students' multiple choice answers",
  "version": "0.0.2",
  "icons": {
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {},
  "browser_specific_settings": {
    "gecko": {
      "id": "{58e0c117-6fb0-45a2-b3e7-b33f555b9fbb}"
    }
  }
}