Donut Browser

The software provides an open‑source browser that isolates each account into its own local profile, assigning a distinct fingerprint, cookie store, and configuration. Users can generate an unlimited number of profiles, which is useful for handling multiple online accounts, separating personal and work browsing, or conducting automated testing.

It supports proxy configuration for each profile and offers a local REST API that allows programmatic control of profiles, proxies, and settings. The API can be used to launch profiles and connect with automation frameworks such as Puppeteer, Playwright, or Selenium, and it includes Model Context Protocol support for integration with AI tools.

Both Chromium‑based and Firefox‑based rendering engines are available, each employing advanced fingerprint spoofing so that every profile presents as a unique, genuine device. The core functionality is free and requires no account creation.