Examine source code of Site Cache Inspector

{
  "manifest_version": 3,
  "name": "Site Cache Inspector",
  "version": "0.2.1",
  "description": "Approximate per-site storage, observed cache activity, site rules for no-cache, and safe cache-clearing controls for Firefox.",
  "action": {
    "default_title": "Site Cache Inspector",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "permissions": [
    "storage",
    "activeTab",
    "tabs",
    "browsingData",
    "scripting",
    "webRequest",
    "webRequestBlocking"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "site-cache-inspector@networkluki.local",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "140.0"
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}