Examine source code of Safe History Cleaner

{
  "manifest_version": 2,
  "name": "Safe History Cleaner (Advanced)",
  "version": "2.1",
  "description": "Automatically deletes adult or unsafe websites and search terms from history.",
  "icons": {
    "16": "icons/icon01.png",
    "48": "icons/icon01.png",
    "128": "icons/icon01.png"
  },
  "permissions": [
    "history",
    "webNavigation",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "safe-history-cleaner@example.com",
      "strict_min_version": "91.0"
    }
  },
  "author": "Alpha Dev",
  "homepage_url": "https://github.com/silverpack01/safe-history-cleaner"
}