Examine source code of FiveLoop

{
  "name": "FiveLoop",
  "version": "3.2",
  "description": "Control your Videos with a MIDI-Foot-Contoller! Set Loops, Adjust the Speed, Play/Pause and Forward/Rewind.",
  "permissions": [
    "storage",
    "activeTab",
    "http://127.0.0.1:54322/*"
  ],
  "optional_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "FiveLoop",
    "default_icon": {
      "16": "images/fiveloopappicon16.png",
      "32": "images/fiveloopappicon32.png",
      "48": "images/fiveloopappicon48.png",
      "128": "images/fiveloopappicon128.png"
    }
  },
  "icons": {
    "16": "images/fiveloopappicon16.png",
    "32": "images/fiveloopappicon32.png",
    "48": "images/fiveloopappicon48.png",
    "128": "images/fiveloopappicon128.png"
  },
  "web_accessible_resources": [
    "assets/fiveloop_logo.svg",
    "signalsmith.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{effb8073-37dd-4771-811a-8edbdeeae494}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "manifest_version": 2
}