Error message: BLOCKED_BY_CLIENT

If you see this error message, it means that the website is blocked by AdBlock.

Please go to Puffin's menu -> Settings -> disable AdBlock and try again.

Cannot connect to server

Puffin Browser is a remote browser. The website contents displayed in Puffin are actually executed on our servers.

Please ensure that the following IP addresses are not blocked by your Proxy, firewall, or antivirus software:





Wrong Geo-location

Puffin leverages our servers in the USA and Singapore to improve the user's web browsing experience'.

The side effect is that the websites receive the Puffin server's IP rather than the IP of your current device.

Although Puffin passes your IP to websites via X-Forwarded-For, some websites do not support this standard and cannot accurately detect your region.

How does Incognito browsing work?

When you browse under Incognito mode, Puffin Browser does not save your browsing history or any information entered in forms. Cookies and site data are deleted when you leave Incognito mode. Please note that Incognito mode is only available when the Cloud Server is turned on.

About the default search engine.

Puffin now offers users more choices of the default search engine.

Go to the main menu > Settings (the gear icon) > "Search engine" to select your preferred searching engine.

Why do I get notifications from Google or other websites when I login using Puffin Browser?

Some websites will send notifications to you if your latest log on location is very different from your normal usage pattern. Others will send notifications for every login.

Puffin is a remote browser. The real browser is running on our servers, which is located in San Jose, California, U.S and Singapore. Once our server renders a webpage, it sends the results to Puffin client app, and the app displays the result in a certain sequence.

When you use Puffin Browser to log in to your accounts, websites receive the IP address of our servers in either Northern California in the United States or Singapore.

In both cases, if you are sure you have just logged in, then there is no need to worry.

If you are unsure, you can check your current Puffin server's IP address against the address provided in the notification email.

You can use Puffin Browser to access the following website, and you will see your current server's IP address. Your device's local IP address as seen from our servers will be shown in the X-Forwarded-For header.


In most cases, Puffin Browser performs much like a proxy server.

Our users' privacy is our top concern. Please refer to our privacy policy for more information.


Crash while clearing history on iOS11.

People who upgrade their iOS system to iOS 11 beta might experience unexpected crashes or freezes while clearing history. The issue is caused by a system fault in the latest beta, and it has been reported to Apple team.

Please clear the history one by one.

Or try incognito mode.

You can also go to the settings to clear all browsing history, but it will clear all your browsing records and most visited websites.

Thanks for your understanding.

Cannot connect

If there's firewall in your network, please disable it. Puffin may not work with firewall.

If you are connecting with cellular/mobile connection, please make sure Puffin is allowed to use your cellular conection in Settings.

You can find the option in Settings -> Cellular -> Puffin, or Settings -> Puffin -> Cellular Data.


If you are using an iOS 10 device, please try to reboot it.

For more info, please refer to 'How to Fix iOS 10 Data Problems' section in the following article.



If not, please let us know the following information:

1. iOS version

2. WIFI or cellular

3. For cellular, the name of your operator.

Please feedback to puffinbrowser+connect@cloudmosa.com. Thank you.


You can also send connection to us by the following steps:

1. Go to http://goo.gl/m7eQsg in Safari browser on your device.

2. Input your mail address and write description.

Then, your IP, device ID and log will be sent to us automatically.

How to access Flash game or Flash video content?

Puffin browser now opens mobile webpages by default. However, most websites do not show Flash content in their mobile pages. To access Flash content, please click the menu and chose 'Open Desktop site' option. And Puffin will reopen the page in the desktop mode.

If you still prefer to open new tabs in the desktop mode every time, please go to Settings and enable the 'Always Desktop Site' option.

How to open download files in my device?

You need to install apps which know how to open the files in your device.

For example, you can open PDF files after installing iBooks. There are other apps such as Dropbox, GoodReader, Keynote can open images, music, videos, MS office and other format of files.

Note that some of them are not free.

Remove most visited websites

Puffin automatically shows the most visited sites on your start page.

To remove them, longpress on the site icon.

Then, click 'Remove' from the popup menu.

Support for Download-to-Cloud 3rd party services

Since June 2017, we will no longer support "Download to Cloud for Dropbox" integration. We'll continue to support "Download to Cloud for Google Drive".

The Dropbox integration APIs do not offer the kind of capabilities we need to expand our app's features in the future. If you would like to use Download-to-Cloud feature, we recommend switching to Google Drive (the basic 15GB Google Drive service is provided for free to everyone).


Network is very slow even when the data signal is strong.

Although the signal is strong, it is possible that the connection between the WiFi provider and Puffin data server is not good.

Thus, please try the following ways to resolve this problem:

1. Close the unused tabs in order to reduce the usage of bandwidth.

2. Close other apps. If you still have the same problem, please click "Feedback" from the menu of Puffin Help, and provide us more info. Thank you!

Staying in incognito mode

Puffin can remember your preference of incognito/normal mode. If you exit Puffin in incognito mode, it stays in incognito mode when next time you launching Puffin. Please follow the steps in the video to go back to normal mode. Click the tab button → Click the mask button.