Examine source code of PutCut

{
  "manifest_version": 2,
  "name": "PutCut",
  "description": "Easily save and share links you like with the PutCut extension!",
  "version": "1.6resigned1",
  "icons": {
    "48": "icons/putcut-48.png",
    "96": "icons/putcut-96.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/putcut-16.png",
      "32": "icons/putcut-32.png"
    },
    "default_popup": "popup.html",
    "default_title": "Save link to PutCut!"
  },
  "permissions": [
    "activeTab",
    "https://putcut.com/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a2707ef1-45d9-4680-83d2-cb2c88e36850}"
    }
  }
}