Examine source code of Tab Count Limit

{
  "manifest_version": 2,
  "name": "Tab Count Limit",
  "description": "Automatically closes tabs that exceed a user-defined limit.",
  "version": "1.0.0",
  "author": "Taylor H.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "applications": {
    "gecko": {
      "id": "tab-count-limit@public.taylor.h",
      "strict_min_version": "102.0"
    }
  }
}