Puffin Browser is a remote browser developed by CloudMosa, an American mobile technology company founded by Shioupyn Shen.

Puffin Browser was initially released in 2010. It uses encrypted cloud servers for content processing. Because it renders webpages in the cloud, it could, according to some benchmark tests, make page loading, content rendering, and JavaScript execution faster than local device processing. However, due to the web pages processed through cloud servers, when the user is browsing the World Wide Web on the Puffin Web Browser, the cloud server's IP address is seen by the website. It relays the network identity of its users to the websites they visit by adding an extra XFF (X-Forwarded-For) header in each HTTP request containing the user's mobile device's IP address. For websites that did not support the XFF header, Puffin Browser is treated as a proxy server.

Puffin Browser is compatible with Adobe Flash Player to play Adobe Flash content, including on mobile devices, where Flash was discontinued due to security issues. The features also include a virtual trackpad, gamepad, and on-screen keyboard functions.

Puffin Browser products from CloudMosa are offered for several different platforms: Puffin Browser on Android (and formerly iOS), Puffin Secure Browser on Windows and on macOS, Puffin Internet Terminal on Linux, Puffin TV Browser on smart TV, and Puffin OS on mainstream smartphones.) Puffin Browser is also known to run on resource-limited hardware like Raspberry Pi, and set-top boxes.

In May 2019, they had announced that they would discontinue the Puffin Web Browser app on iOS devices due to Apple's App Store policies. However, CloudMosa has released Puffin Web Browser Lite for iOS devices which does not have Adobe Flash Player Support.