Examine source code of ReturnNewReddit

{
  "manifest_version": 3,
  "name": "ReturnNewReddit",
  "version": "0.1.1",
  "description": "Mimic new.reddit.com user interface",
  "homepage_url": "https://github.com/dauphine-dev/returnnewreddit",
  "browser_specific_settings": {
    "gecko": {
      "id": "ReturnNewReddit@dauphine-dev",
      "strict_min_version": "128.0"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.reddit.com/*"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ]
}