Hướng dẫn
Cách đọc bảng xếp hạng, các bài đo thực sự làm gì, và vì sao trình duyệt có thể bị nhận diện mà không cần cookie. Viết cho những ai muốn hiểu, không chỉ để xem.
Xếp hạng và đo lường
Bảng xếp hạng, phương pháp đo, kiểm duyệt theo khu vực và cách chọn công cụ.
6
How to read the rankingsTiếng Anh
Every column on the leaderboard has a rule behind it: why we use medians, why some tools show “—” instead of a rank, what the “services only” toggle filters, and how the GreatFire rank column is computed.
Đọc 6 phút · 10 thg 9, 2026
How we measureTiếng Anh
What the speed, latency, reachability and stability tests actually do inside your browser, how each number is derived, and the biases a browser-based test can't escape.
Đọc 7 phút · 10 thg 9, 2026
Censorship by region: why the same tool behaves so differently across bordersTiếng Anh
Mainland China, Russia, Iran and Turkmenistan each block the internet in their own way, which is why the rankings are split by region. Here is what each system tends to target, how, and why that shows up directly in speed and stability numbers.
Đọc 6 phút · 10 thg 9, 2026
What to look for when choosing a circumvention toolTiếng Anh
Too many protocol names, even more providers. One-line explanations of each common protocol, the trade-offs between self-hosting and subscribing, what free tools really cost, and how to use this site's data to cross-check any claim.
Đọc 6 phút · 10 thg 9, 2026
GreatFire and this siteTiếng Anh
Who GreatFire.org is, what Circumvention Central does, how this site imports and labels its data, and where the line between the two projects sits.
Đọc 6 phút · 10 thg 9, 2026
Data access and the APITiếng Anh
Every number on this site is available as JSON: the rankings, the raw test records, per-tool statistics and the external observatories. This page lists the endpoints, their parameters, how often they change, and the terms for reusing the data.
Đọc 8 phút · 10 thg 9, 2026
Dấu vân tay trình duyệt
Mỗi mô-đun trong phòng thí nghiệm dấu vân tay đo gì, vì sao quan trọng và bạn có thể làm gì.
8
What is browser fingerprintingTiếng Anh
A website can recognise you without a single cookie: collect a few dozen browser attributes, hash them, and you have a fingerprint. How it works, why entropy adds up, how fingerprints differ from cookies, and the thinking behind this site's "fingerprint authenticity" score.
Đọc 6 phút · 10 thg 9, 2026
WebRTC leaks: why your IP shows even with the VPN onTiếng Anh
To set up peer-to-peer calls, WebRTC asks a STUN server what your public address looks like, and that request often slips past the VPN. How the leak works, why testing from China needs domestic STUN servers, and what turning WebRTC off costs you.
Đọc 6 phút · 10 thg 9, 2026
Canvas, WebGL and audio fingerprints: how your hardware gives you awayTiếng Anh
Where the three most common hardware-related fingerprints get their variation, why the same machine looks different in another browser, and why noise-adding extensions usually make you more visible, not less. With a note on WebGPU.
Đọc 6 phút · 10 thg 9, 2026
Time zone, language and IP: how a site notices you're pretendingTiếng Anh
Risk systems rarely decide on one signal. They check whether the time zone inferred from your IP, the one your browser reports, your system clock, the HTTP language header and the JavaScript language list agree with each other. Which mismatches are normal, and which get punished.
Đọc 6 phút · 10 thg 9, 2026
User-Agent decay and the rise of Client HintsTiếng Anh
The User-Agent string carries thirty years of compatibility baggage, and Chrome has frozen it into a near-empty template. Client Hints took over the details. Here is what each one exposes, and how sites catch a browser whose UA has been edited.
Đọc 6 phút · 10 thg 9, 2026
How sites decide you are a botTiếng Anh
Headless browsers and automation scripts leave traces in navigator, the window object, the DevTools protocol and the network layer. This explains where each signal comes from, why none is reliable on its own, and why ordinary humans get flagged too.
Đọc 6 phút · 10 thg 9, 2026
IP quality: residential, datacenter, and where the “proxy” flag comes fromTiếng Anh
Beyond the country, websites classify your IP as home broadband, datacenter or mobile, and attach labels like proxy or hosting. Here is where those labels come from, why a VPN exit is almost always a datacenter address, and what that means for you in practice.
Đọc 5 phút · 10 thg 9, 2026
DNS leaks, open ports and TLS fingerprintsTiếng Anh
Three side channels that are easy to overlook: name resolution slipping outside the tunnel, port 22 or 3389 open on your public IP, and the TLS handshake itself giving away your client. How each works, how this site checks them, and how to cross-check yourself.
Đọc 5 phút · 10 thg 9, 2026