Speed Test Pro 作者： Libor Benes (Dr. B)
Measure your internet speed (ping, download, upload) with 1 click, 100% client-side in your browser. No external APIs or services required. Uses Cloudflare’s public endpoints for accurate multi-stream testing. Export history as timestamped JSON.
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Speed Test Pro is a lightweight, privacy-first Firefox extension that measures your real Internet connection speed (ping, download, and upload) entirely client-side using pure JavaScript — no external speed-test APIs or third-party services are needed.
Modern browsers can measure speed directly, and Speed Test Pro leverages exactly this capability to exactly measure Internet speed with a professional-grade multi-stream approach:
• Ping/Latency: Lightweight HEAD requests with automatic fallback.
• Download: Progressively larger dummy files (100 KB → 500 KB → 1 MB).
• Upload: Random binary data blobs POSTed in multiple sizes (50 KB → 100 KB → 200 KB).
Results appear instantly in a clean popup with a live progress bar. Every test is automatically saved to persistent local history (IndexedDB) and can be exported as a perfectly formatted JSON file with timestamps.
Features:
• One-click full speed test (ping + download + upload).
• Real-time progress bar with clear status messages.
• Beautiful, modern popup UI with large readable metrics.
• Persistent local history (survives browser restarts).
• Export entire history as speedtest_export_YYYY-MM-DDTHH-MM-SS.json
• Scrollable history modal + one-click Clear All.
• Automatic last-result display when you open the popup.
• 100% client-side — nothing leaves your browser.
Ideal For:
• Remote workers, gamers, and streamers checking connection quality.
• Troubleshooting slow internet or high latency.
• Monitoring ISP performance over time.
• Keeping a personal archive of speed tests for parsing and analysis.
• Anyone who wants accurate results without ads or heavy apps.
Security-First Architecture:
• Completely client-side — no external APIs or services beyond the minimal public Cloudflare endpoints needed for measurement.
• No data collection, no telemetry, no tracking.
• Explicitly declared “no data collection” in the manifest.
• All tests and history stay on your machine.
Technical Details:
• Works on Firefox 140.0+ (64-bit desktop).
• Pure JavaScript implementation (no external libraries).
• Multi-stream testing for better real-world accuracy.
• Lightweight and fast (~2 seconds per test).
• Runtime Execution RAM Footprint: ~33 KB (manifest.json + popup.html + popup.css + settings.js + background.js).
• Total Extension Download/Install Size: ~73 KB (including README.md).
Note on Accuracy:
Browser-based tests provide excellent real-world estimates, but results can be affected by network conditions, background processes, and browser throttling. They are not laboratory-grade measurements.
Test Speed Test Pro on any connection — the results are accurate, the export is clean, and your data never leaves your machine.
Modern browsers can measure speed directly, and Speed Test Pro leverages exactly this capability to exactly measure Internet speed with a professional-grade multi-stream approach:
• Ping/Latency: Lightweight HEAD requests with automatic fallback.
• Download: Progressively larger dummy files (100 KB → 500 KB → 1 MB).
• Upload: Random binary data blobs POSTed in multiple sizes (50 KB → 100 KB → 200 KB).
Results appear instantly in a clean popup with a live progress bar. Every test is automatically saved to persistent local history (IndexedDB) and can be exported as a perfectly formatted JSON file with timestamps.
Features:
• One-click full speed test (ping + download + upload).
• Real-time progress bar with clear status messages.
• Beautiful, modern popup UI with large readable metrics.
• Persistent local history (survives browser restarts).
• Export entire history as speedtest_export_YYYY-MM-DDTHH-MM-SS.json
• Scrollable history modal + one-click Clear All.
• Automatic last-result display when you open the popup.
• 100% client-side — nothing leaves your browser.
Ideal For:
• Remote workers, gamers, and streamers checking connection quality.
• Troubleshooting slow internet or high latency.
• Monitoring ISP performance over time.
• Keeping a personal archive of speed tests for parsing and analysis.
• Anyone who wants accurate results without ads or heavy apps.
Security-First Architecture:
• Completely client-side — no external APIs or services beyond the minimal public Cloudflare endpoints needed for measurement.
• No data collection, no telemetry, no tracking.
• Explicitly declared “no data collection” in the manifest.
• All tests and history stay on your machine.
Technical Details:
• Works on Firefox 140.0+ (64-bit desktop).
• Pure JavaScript implementation (no external libraries).
• Multi-stream testing for better real-world accuracy.
• Lightweight and fast (~2 seconds per test).
• Runtime Execution RAM Footprint: ~33 KB (manifest.json + popup.html + popup.css + settings.js + background.js).
• Total Extension Download/Install Size: ~73 KB (including README.md).
Note on Accuracy:
Browser-based tests provide excellent real-world estimates, but results can be affected by network conditions, background processes, and browser throttling. They are not laboratory-grade measurements.
Test Speed Test Pro on any connection — the results are accurate, the export is clean, and your data never leaves your machine.
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