BlockCoin is a free browser extension developed by Felisha & Sharleen. It is designed to effectively prevent cryptocurrency miners from operating within web browsers. The extension aims to block these miners across all websites, ensuring a safe browsing experience.

BlockCoin utilizes two methods to stop miners from working. Firstly, it blocks requests that are loaded from a predefined blacklist, which is a common technique used by ad-blockers and mining blockers. This ensures that known mining scripts are automatically blocked. Secondly, the extension detects possible mining activities within loaded scripts and promptly stops them, preventing any unwanted mining operations.

For transparency and accountability, the source code of BlockCoin is available on Github. This allows users to review the code and ensure its integrity. The extension's developers, Felisha Miranda and Sharleen Emmanuela, have provided their contact information for any inquiries or feedback.

BlockCoin is a valuable tool for those concerned about their online privacy and security. By effectively preventing cryptocurrency miners, it helps ensure a smooth and uninterrupted browsing experience.