Block Beacon & Ping Requests in Your Browser

Overview

The API-Killer-Beacon extension is designed to enhance browser privacy by actively blocking HTML5's JavaScript sendBeacon method and all HTTP requests using the PING protocol. It functions as a low-level firewall for beacon traffic, preventing data from being silently transmitted to third-party servers without user consent. This is particularly useful in scenarios where websites implement strict Content-Security-Policy headers that restrict JavaScript execution, making traditional blocking methods ineffective. In such cases, the extension still intercepts and stops the actual HTTP request at the network level, ensuring no beacon-related data leaves the browser.

Targeted primarily at privacy-conscious users and web developers, this tool helps prevent covert data collection mechanisms often used by analytics platforms, tracking scripts, and performance monitoring tools. It is ideal for users who want to maintain full control over their browsing data, especially those who rely on ad blockers like uBlock Origin but have encountered limitations with beacon blocking. The extension was developed out of a personal need to fix a specific issue with existing rules that unintentionally blocked download requests, making it a niche yet practical solution.

As a lightweight, offline tool, it operates without collecting user data, running no analytics, and displaying no advertisements. The developer has emphasized transparency and security, positioning it as a reliable option for users who value minimalism and privacy. While no system requirements or performance metrics were specified, its small size and focus on network-level filtering suggest efficient operation.

Key Features & Capabilities

• Blocks sendBeacon API – Prevents JavaScript from using the HTML5 sendBeacon method to send data asynchronously, even after page unload.
• Intercepts PING Protocol Requests – Stops all HTTP requests that use the PING protocol, a lesser-known but potentially intrusive method for tracking.
• Network-Level Firewall Functionality – Operates at the request level, ensuring blocked traffic never reaches the network, even when JavaScript execution is restricted by CSP headers.
• Compatibility with Strict Security Policies – Maintains effectiveness on sites like addons.mozilla.org where JavaScript injection is blocked by Content-Security-Policy.
• Zero Data Collection – Does not collect, transmit, or store any user data; runs entirely offline and without analytics.
• Lightweight & Fast – With a file size of just 1.2 MB, it is designed for minimal impact on browser performance.

Real-world usage includes protecting sensitive browsing sessions, preventing background telemetry from websites, and ensuring compliance with privacy standards in professional environments. Developers can use it to test how their own applications behave under strict privacy settings. Because it doesn’t rely on JavaScript injection in the page context, it remains effective even when other extensions fail due to security restrictions.

User Interface, Workflow & Performance

The extension’s interface is intentionally minimal, reflecting its focused purpose. There is no visible dashboard or settings panel, which aligns with its design philosophy of being unobtrusive and efficient. Users interact with it through the browser’s extension management system, where it operates silently in the background.

Navigation is straightforward: once installed, the extension begins filtering beacon and PING requests immediately. No configuration is required, making it accessible to non-technical users. The workflow is fully automated, with no user input needed after installation. This passive operation reduces cognitive load and ensures consistent protection without interference.

Performance details were not provided by the developer. However, given its small size and focus on network-level filtering, it is expected to have low CPU and RAM usage. The extension does not perform complex computations or maintain persistent background processes. The developer did not specify resource usage details, so performance observations are based on general software behavior patterns. Stability is assumed to be high due to the lack of external dependencies and the absence of telemetry or data collection.

Compatibility & System Requirements

API-Killer-Beacon is compatible with Windows, Mac, and Linux operating systems. It is designed as a browser extension for both Chrome and Firefox, supporting modern web browsers that allow extension development.

The installation size is 1.2 MB, indicating a compact footprint. The software version is 1.0.0, released on June 1, 2024. The developer did not provide additional system requirements, such as minimum RAM, CPU, or browser version details. Exact system requirements were not listed, so users should ensure their browser supports web extensions and has the necessary permissions enabled.

Compatibility information was partially provided. While the extension is confirmed to work on major platforms, specific version compatibility (e.g., Firefox 100+, Chrome 110+) was not specified. Users are advised to install it through official browser extension stores for optimal compatibility and security.

Pros and Cons

Pros

• Effectively blocks beacon and PING requests at the network level
• Works even when JavaScript execution is restricted by CSP headers
• 100% free, ad-free, and privacy-respecting
• Runs entirely offline with no data collection
• Small file size (1.2 MB) and lightweight operation
• No configuration needed – automatic protection upon installation

Cons

• No user interface or settings panel for customization
• Limited visibility into blocked requests or logs
• Exact system requirements and browser compatibility details not provided
• May not be suitable for users who need detailed control or reporting
• Only available as a browser extension, not a standalone desktop application

FAQ Section

Is API-Killer-Beacon compatible with Firefox and Chrome?

Yes, the extension is designed to work with both Firefox and Chrome, supporting modern browser environments that allow web extension development.

Does this extension collect any user data?

No, the extension does not collect, store, or transmit any user data. It operates entirely offline and includes no analytics or tracking mechanisms.

Can I use this extension on Linux, Windows, and Mac?

Yes, the extension is compatible with Windows, Mac, and Linux operating systems, provided the browser supports web extensions.

Is API-Killer-Beacon free to use?

Yes, the extension is 100% free, as in freedom (beer), with no ads, subscriptions, or hidden costs.

Does the extension require updates?

While automatic updates depend on the browser’s extension management system, users are encouraged to keep the extension up to date for security and compatibility. The developer has not specified a release schedule.

Final Thoughts

API-Killer-Beacon delivers a precise and powerful solution for users seeking to eliminate beacon and PING-based data leakage from their browsing sessions. Its ability to block requests even under strict Content-Security-Policy restrictions sets it apart from standard ad blockers. The absence of ads, data collection, and complex settings makes it a trustworthy tool for privacy advocates and developers alike.

While it lacks a user interface and detailed logging, its minimalist design ensures reliability and performance. For users who prioritize privacy and simplicity, this extension is a must-have addition to their browser toolkit. It fills a critical gap left by existing tools like uBlock Origin, particularly in cases where beacon blocking interferes with legitimate download actions.

Download API-Killer-Beacon now to secure your browsing experience with a lightweight, transparent, and effective privacy shield.