Examine source code of Tabmarks

{
  "applications": {
    "gecko": {
      "id": "tabmarks@bitgarten.ch",
      "strict_min_version": "52.0"
    }
  },
  "manifest_version": 2,
  "name": "Tabmarks",
  "version": "1.0.1resigned1",
  "description": "Web Extension for handling groups of tabs persisted as bookmarks",
  "homepage_url": "https://github.com/hupf/tabmarks",
  "author": "Mathis Hofer",
  "icons": {
    "48": "assets/icons/tabmarks.svg"
  },
  "permissions": [
    "bookmarks",
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "assets/icons/tabmarks.svg",
    "default_title": "Tabmarks",
    "default_popup": "src/default-popup/default-popup.html"
  },
  "options_ui": {
    "browser_style": true,
    "page": "src/options/options.html"
  },
  "web_accessible_resources": [
    "assets/icons/tabmarks.svg"
  ]
}