Examine source code of Memory Fox

{
  "manifest_version": 2,
  "name": "Memory Fox",
  "version": "1.0",
  "description": "Helps optimize memory usage by triggering tab memory cleanup.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Memory Fox"
  },
  "permissions": [
    "tabs",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6a1376f-fc6d-4e16-ab55-3507dc8eb90e}"
    }
  }
}