Return The Red Subscribe Button

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Return The Red Subscribe Button",
  "short_name": "Red Subscribe Button",
  "version": "0.5.1.5",
  "description": "Brings back the classic red subscribe button.",
  "icons": {
    "48": "images/icon_small.png",
    "128": "images/icon.png"
  },
  "action": {
    "default_popup": "/popup/info.html"
  },
  "content_scripts": [
    {
      "css": [
        "css/variables.css"
      ],
      "js": [
        "scripts/apply_settings.js"
      ],
      "matches": [
        "*://www.youtube.com/*"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "css/subscribe_button.css",
        "css/blue_buttons.css",
        "css/like_button.css",
        "css/uppercase_letters.css",
        "css/uppercase_engagment.css",
        "css/rectangle_buttons.css"
      ],
      "matches": [
        "*://www.youtube.com/*"
      ]
    }
  ]
}