Examine source code of NoRedditNewTab (NRNT)

{
  "manifest_version": 2,
  "name": "NoRedditNewTab",
  "version": "1.0",
  "description": "Tiny browser extension that stops Reddit opening clicked notifications in new tabs",
  "icons": {
    "48": "icons/icon48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "NoRedditNewTab.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "noredditnewtab@reecemercer.dev"
    }
  }
}