Firefly platforms

Platform Speed Stability
Android 397 kbps 100%
Windows 298 kbps 100%

Firefly protocols

Other: Other protocol.

Firefly performance

by month | year



Number of tests

All Tests

Created At Platform Location Median Speed Stability
2020-01-01 Windows 299.44 100.00%
2020-01-01 Windows 359.70 100.00%
2019-12-18 Android 397.35 100.00%
2019-11-20 Windows 234.66 100.00%
2019-11-13 Windows 204.94 100.00%
2019-11-11 Windows 198.64 100.00%
2019-10-18 Windows 31.05 80.95%
2019-10-14 Windows 252.47 100.00%
2019-09-24 Windows 835.11 100.00%
2019-06-12 Windows 267.82 100.00%
2019-04-27 Windows 315.28 100.00%
2019-04-27 Windows 152.35 73.81%
2019-03-25 Windows 214.64 85.71%
2019-03-21 Windows 1600.78 100.00%
2019-02-23 Linux 49.17 100.00%
2019-02-23 Linux 88.02 100.00%
2019-02-19 Windows 217.82 100.00%
2019-02-08 Windows 179.14 100.00%
2019-01-24 Windows 165.59 97.62%
2019-01-24 Windows 69.31 97.62%
2018-11-28 Windows 275.84 100.00%
2018-10-08 Android 168.48 100.00%
2018-10-04 Android 562.33 100.00%
2018-08-05 Windows 171.19 100.00%
2018-08-05 Windows 145.99 100.00%
2018-07-02 Windows 833.01 100.00%
2018-06-25 Windows 122.11 100.00%
2018-06-24 Windows 694.24 100.00%
2018-06-24 Windows 545.09 100.00%
2018-06-24 Windows 393.01 100.00%
2018-06-24 Windows 336.65 100.00%
2018-06-21 Windows 399.99 100.00%
2018-06-21 Windows 549.89 90.48%
2018-06-20 Windows 309.42 100.00%
2018-06-20 Windows 404.20 100.00%
2018-06-08 Windows 457.76 95.24%
2018-06-01 Windows 376.78 97.62%
2018-05-03 Linux 194.00 100.00%
2018-04-16 Windows 1829.23 100.00%
2018-03-21 Android 177.18 100.00%
2018-03-05 Windows 900.46 100.00%
2018-02-23 Mac OS 383.11 100.00%
2018-02-21 Windows 450.58 100.00%
2018-02-20 iOS 263.08 90.48%
2018-02-20 iOS 249.83 100.00%
2018-02-20 iOS 341.63 90.48%
2018-02-20 iOS 58.61 95.24%
2018-02-20 Windows 489.65 100.00%
2018-01-31 Windows 506.01 100.00%
2018-01-26 Windows 201.85 100.00%
2018-01-22 Windows 71.43 90.48%
2018-01-18 Windows 452.70 100.00%
2017-12-31 Windows 798.69 100.00%
2017-12-31 Windows 1009.04 100.00%
2017-12-23 Android 320.96 71.43%
2017-12-06 Mac OS 1759.68 100.00%
2017-12-01 Windows 475.77 97.62%
2017-11-19 iOS 262.54 100.00%
2017-10-27 Windows 63.56 97.62%
2017-10-27 Windows 287.41 100.00%
2017-10-27 Windows 323.22 100.00%
2017-10-26 Windows 103.38 90.48%
2017-10-18 Windows 164.10 97.62%
2017-10-14 Windows 393.27 95.24%
2017-10-14 Windows 228.71 95.24%
2017-10-12 Windows 349.75 90.48%
2017-10-11 Windows 371.36 85.71%
2017-10-05 Android 415.26 90.48%
2017-10-05 Windows 342.66 90.48%
2017-09-14 Android 219.59 100.00%
2017-09-08 Windows 417.01 100.00%
2017-08-29 Windows 153.76 97.62%
2017-08-14 Windows 300.04 100.00%
2017-08-07 Mac OS 229.68 100.00%
2017-08-05 Windows 541.37 100.00%
2017-08-05 Windows 91.63 95.24%
2017-07-18 Linux 154.40 100.00%
2017-07-13 Windows 306.14 100.00%
2017-07-13 Android 184.82 100.00%
2017-07-05 Windows 67.52 95.24%
2017-07-04 Windows 239.47 90.48%
2017-06-30 Mac OS 164.87 100.00%
2017-06-14 Windows 857.78 100.00%
2017-05-19 Windows 371.60 97.62%
2017-04-18 Mac OS 407.90 100.00%
2017-04-17 Windows 414.17 100.00%
2017-04-16 Windows 183.04 100.00%
2017-04-16 Windows 133.23 100.00%
2017-04-16 Windows 245.44 100.00%
2017-04-16 Android 224.79 100.00%
2017-04-14 Android 136.85 100.00%
2017-04-14 Android 155.66 100.00%
2017-04-13 Android 243.78 100.00%

Discuss Firefly

Frequently Asked Questions

Why should I buy my circumvention service on Circumvention Central?

  • You can download the latest Android client without Google Play.
  • You can download and install the latest Windows client to your computer without circumventing.
  • You can use Alipay to buy any service.
  • Bilingual installation guides.
  • Bilingual customer support.
  • Support all of GreatFire's work including FreeBrowser and FreeWeibo.

How do you measure the speed of a circumvention tool?

The speed test that we have developed aims to reflect the real user experience. While a visitor to the site runs a test, in the background, their browser is downloading resources from the ten most popular websites in the world. According to Alexa, these sites are Google, Facebook, YouTube, Baidu, Amazon, Yahoo, Wikipedia, QQ, Twitter and Microsoft Live. The speed reported is simply the size of the file downloaded divided by the time taken to download it. We also verify whether the downloaded resource is complete. If the contents returned are incorrect or if the download fails to complete within 40 seconds, we mark it as failed. This data is then used to calculate our other main indicator - stability.

Other speed tests typically just measure download and upload speed by sending a couple of requests to the speed test server itself. The reported speed is not reflective of the user experience because normal browsing involves frequently sending lots of requests (not downloading or uploading one big file) to many different servers, not just one.

Why do you measure the stability of a circumvention tool?

Stability is typically not tested by other services at all. A healthy internet connection anywhere is supposed to deliver 100% stability, unless someone pulls the cable during the test. But using a circumvention tool in China is different. At any point, the connection can become unstable and/or go down completely. Individual requests may fail depending on the size of the request, the final destination and how they are proxied. Thus comparing service stability is just as important if not more important than comparing speed.

Can I test any circumvention tool on the site?

You can use our speed and stability tests with any circumvention tool, whether it is listed on our site or not. VPN users from around China will be able to test their tool on the site and those results will be added to our data. This data will be available for all to see.

Can I see the inner workings of your tests?

Tech savvy users can inspect how we conduct our tests by reviewing our javascript code.

Does make money if I subscribe to a circumvention tool on this site?

One of the objectives in launching CC is to generate revenue for At the moment GreatFire relies on the kindness of individuals who send us donations and from a host of grant-making organizations around the world. We want to reduce our reliance on these organizations and set on a path of self-sustainability. Visitors to the CC site will be able to purchase any paid-for tool that we currently test. GreatFire will act as a reseller of these tools in China and as such we will be given a portion of each sale by the VPN providers themselves. Users need not be based in China to purchase a circumvention service.

How does CC compare to other VPN review websites?

There are a host of websites that provide “VPN reviews” and “VPN ratings”. But anybody who has visited those sites can quickly see that they act as referral and marketing sites for a small subset of VPN providers and that most of those services do not work in China.

Where did you find those VPNs?

We used this great list of VPNs put together by That One Privacy Guy. We took that list and recruited a team of testers across China and tested almost every tool to see what works and what does not. It will come as little surprise to those in China to know that a very small number of these tools actually work in China.

Do we think that the authorities will use our website to crackdown on VPNs that work?

It would be very easy to completely block all VPNs if the authorities wanted to. However, we believe that they have not because of the importance of allowing access for businesses and for others. The goal of CC is simply to make it easier for all to find the circumvention tools that work the best.

Your tests tell me that my favorite tool does not work but it’s working great for me, what gives? Your tests tell me that my favorite tool works but it’s not working for me, what gives?

Test results can vary according to location, the service you are using to connect to the internet and your device. As more people use this site to test their circumvention tools, we will accumulate more data and will be able to develop a clearer idea of what is working and what is not.

How do you measure “stability”?

When you test your tool on our site in the background we download a certain number of images. If these images do not download or take more than 40 seconds to download then we consider this to be a failed test of stability and we calculate a percentage based on the number of images we attempted to download during the test.

Circumvention Central / VPN Terms of Service:

Dear user, to provide a better experience, before purchasing a VPN service please carefully read through our terms:

  1. All the VPN services are provided by the respective VPN provider and not by Circumvention Central.
  2. If when using the VPN service you cannot connect to the service or find the service to be unstable, there can be several causes:
    1. Problems with your device or software.
    2. Problems originating from the VPN provider itself.
    3. The Great Firewall has temporarily or permanently blocked the VPN service.
    In case of (a), our customer service will try to assist you in resolving the problem. In the case of (b) or (c), we will alert the VPN provider of the problem and assist them in resolving it.
  3. We provide test data that helps you find a VPN provider that works well. However, if the VPN provider that you selected still does not work for you, we cannot provide a refund. Before choosing a VPN provider, please carefully review the performance data, user reviews or register a free trial account first (if available).

By purchasing a VPN service, you agree to these terms.