Examine source code of DeSponsored

{
  "manifest_version": 2,
  "name": "DeSponsored",
  "version": "1.0.0",
  "description": "Removes sponsored and ad results from Google, Bing, and DuckDuckGo searches.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.google.com/search*",
        "*://www.google.at/search*",
        "*://www.google.co.uk/search*",
        "*://www.google.de/search*",
        "*://www.google.fr/search*",
        "*://www.google.ca/search*",
        "*://www.google.com.au/search*",
        "*://www.bing.com/search*",
        "*://duckduckgo.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "desponsored@local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}