Examine source code of Space Wallpapers

{
  "manifest_version": 2,
  "name": "Space Wallpapers",
  "description": "The Space Wallpapers feature breathtaking and mysterious scenes of the cosmos",
  "version": "1.0.0",
  "permissions": [
    "bookmarks",
    "storage",
    "tabs"
  ],
  "chrome_url_overrides": {
    "newtab": "newpage.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "newpage.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8948b3cd-a8f4-477b-8bfe-62caa8d38666}"
    }
  }
}