Examine source code of Multi-Clipboard Manager

{
  "manifest_version": 2,
  "name": "Multi-Clipboard Manager",
  "version": "1.3",
  "description": "Save multiple clipboard entries and reuse them easily.",
  "permissions": [
    "storage",
    "clipboardRead",
    "clipboardWrite",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/logo_64.png"
  },
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9aa2ac94-c609-4872-afec-e099e3a9f4b0}"
    }
  }
}