Examine source code of Dumpster

{
  "name": "Dumpster",
  "short_name": "Save and organize links",
  "description": "Save and organize links",
  "version": "6",
  "homepage_url": "https://dumpster.app",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "page": "background.html"
  },
  "browser_action": {
    "default_title": "Save to Dumpster",
    "default_popup": "popup.html",
    "theme_icons": [
      {
        "light": "icons/extension_icon_light_16.png",
        "dark": "icons/extension_icon_16.png",
        "size": 16
      },
      {
        "light": "icons/extension_icon_light_48.png",
        "dark": "icons/extension_icon_48.png",
        "size": 48
      },
      {
        "light": "icons/extension_icon_light_128.png",
        "dark": "icons/extension_icon_128.png",
        "size": 128
      }
    ]
  },
  "icons": {
    "16": "icons/extension_icon_16.png",
    "48": "icons/extension_icon_48.png",
    "128": "icons/extension_icon_128.png"
  },
  "manifest_version": 2
}