Examine source code of Medium Members-Never

{
  "manifest_version": 3,
  "name": "Medium Members Never",
  "version": "1.1.1",
  "description": "Remove Medium member-only (paid) articles from feeds and lists.",
  "browser_specific_settings": {
    "gecko": {
      "id": "medium-members-never@tyler.cloud",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://medium.com/*",
    "https://*.medium.com/*",
    "https://towardsdatascience.com/*",
    "https://*.towardsdatascience.com/*",
    "https://betterprogramming.pub/*",
    "https://*.betterprogramming.pub/*",
    "https://levelup.gitconnected.com/*",
    "https://*.gitconnected.com/*",
    "https://uxdesign.cc/*",
    "https://*.uxdesign.cc/*",
    "https://javascript.plainenglish.io/*",
    "https://*.plainenglish.io/*",
    "https://blog.bitsrc.io/*",
    "https://*.bitsrc.io/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Medium Members Never: on",
    "default_icon": {
      "48": "icons/enabled-48.png",
      "96": "icons/enabled-96.png"
    }
  },
  "icons": {
    "48": "icons/enabled-48.png",
    "96": "icons/enabled-96.png",
    "128": "icons/enabled-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://medium.com/*",
        "https://*.medium.com/*",
        "https://towardsdatascience.com/*",
        "https://*.towardsdatascience.com/*",
        "https://betterprogramming.pub/*",
        "https://*.betterprogramming.pub/*",
        "https://levelup.gitconnected.com/*",
        "https://*.gitconnected.com/*",
        "https://uxdesign.cc/*",
        "https://*.uxdesign.cc/*",
        "https://javascript.plainenglish.io/*",
        "https://*.plainenglish.io/*",
        "https://blog.bitsrc.io/*",
        "https://*.bitsrc.io/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}