Examine source code of Noise

{
  "name": "Noise",
  "description": "__MSG_extDescription__",
  "version": "4.4.1",
  "homepage_url": "https://github.com/bootleq/noise",
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "manifest_version": 2,
  "permissions": [
    "storage",
    "downloads",
    "<all_urls>"
  ],
  "optional_permissions": [
    "webNavigation",
    "webRequest",
    "tabGroups"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "all_frames": true,
      "js": [
        "content.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "noise@bootleq",
      "strict_min_version": "69.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}