Examine source code of blcPlus

{
  "manifest_version": 3,
  "name": "blcPlus",
  "version": "1.0",
  "icons": {
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "description": "Fixes session timeouts and injects custom CSS on the university portal.",
  "permissions": [
    "storage",
    "scripting",
    "alarms"
  ],
  "host_permissions": [
    "https://elearn.daffodilvarsity.edu.bd/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://elearn.daffodilvarsity.edu.bd/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://elearn.daffodilvarsity.edu.bd/*"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_start"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "blcPlus Settings",
    "default_icon": {
      "16": "icons/16x16.png",
      "32": "icons/32x32.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "blcplus@6ayzid.github.io",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}