Examine source code of PlanMyTimetable Capture

{
  "manifest_version": 2,
  "name": "PlanMyTimetable Capture",
  "description": "Capture timetable data to use on PlanMyTimetable.",
  "version": "1.0.6",
  "icons": {
    "16": "icon.svg",
    "48": "icon.svg",
    "96": "icon.svg",
    "128": "icon.svg",
    "256": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Capture@PlanMyTimetable.org",
      "strict_min_version": "109.0"
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "tabs"
  ],
  "browser_action": {
    "default_title": "PlanMyTimetable Capture",
    "default_icon": {
      "16": "icon-greyed.svg",
      "48": "icon-greyed.svg",
      "96": "icon-greyed.svg",
      "128": "icon-greyed.svg",
      "256": "icon-greyed.svg"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}