Examine source code of Backup-Tabs

{
  "manifest_version": 2,
  "name": "Backup-Tabs",
  "version": "0.0.0.1",
  "description": "Save and import tab links",
  "homepage_url": "https://github.com/BeroNizic/backup-tabs",
  "icons": {
    "48": "icons/save-48.png"
  },
  "permissions": [
    "downloads",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/save-32.png",
    "default_title": "Backup-Tabs",
    "default_popup": "popup/options.html"
  }
}