Examine source code of Tab Cruncher

{
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "58.0a1"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "Tab Cruncher",
    "default_popup": "tab-cruncher.html",
    "default_icon": {
      "16": "new-tab.png",
      "32": "new-tab.png"
    }
  },
  "options_ui": {
    "page": "options.html"
  },
  "description": "An Add On that allows you to save open tabs into a tab collection.",
  "homepage_url": "https://github.com/langens-jonathan/tab-cruncher",
  "manifest_version": 2,
  "name": "Tab Cruncher",
  "permissions": [
    "tabs",
    "storage"
  ],
  "version": "1.0"
}