Examine source code of Tab Session Saver

{
  "manifest_version": 2,
  "name": "Tab Session Saver",
  "version": "2.2",
  "description": "Save and restore your browser tab sessions",
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_title": "Tab Session Saver",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.svg"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad0d5f0e-284c-41f4-9d7e-f8f0054c55d9}"
    }
  }
}