Examine source code of NetProtector

{
  "manifest_version": 2,
  "name": "NetProtector",
  "version": "1.0.4",
  "description": "NetProtector enhanced browsing protection variant 4",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/icon48.png"
    },
    "default_popup": "popup.html",
    "default_title": "CleanBrowse"
  },
  "background": {
    "scripts": [
      "safesurf.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      },
      "id": "{c8128853-c23f-4944-bd1d-70c08f694c6d}"
    }
  }
}