Examine source code of Local Sheriff

{
  "name": "Local Sheriff",
  "applications": {
    "gecko": {
      "id": "localsheriff@cliqz.com",
      "strict_min_version": "62.0"
    }
  },
  "version": "0.8",
  "description": "Local sheriff is a reconnaissance tool in your browser for your data.",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "icons": {
    "256": "icons/sheriff.png"
  },
  "browser_action": {
    "default_icon": "icons/sheriff-128x128.png"
  },
  "permissions": [
    "http://*/*",
    "https://*/*",
    "tabs",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "unlimitedStorage",
    "webNavigation",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "static/js/dexie.js",
      "database.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "match_about_blank": true,
      "js": [
        "scripts/content-script.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "manifest_version": 2
}