Gazelle browser

This page was last updated at: Feb 25, 2026

Gazelle was a Desktop web browser that ran on Windows. It was developed by Microsoft. It was a short lived project, actively developed for under a year.

Gazelle was a research web browser project by Microsoft Research; the main idea of the project was to apply the principles that guide good Operating System design & building to that of Web Browser development. In particular, having a solid "kernel" of the system, and then having different, independent layers above it; so that if one aspect had an issue it wouldn't crash the whole browser.

About Gazelle

Browser URL www.microsoft.com/en-us/research/publication/the-multi-principal-os-construction-of-the-gazelle-web-browser/
Browser made by Microsoft
Development Status Discontinued
The developers have announced that the browser won't be developed any more
This was a research project by Microsoft that was never fully released.
Launched 2009
Discontinued 2009
Operating System Windows
Device platform Desktop
Rendering Engine Custom
Unknown, but since Microsoft were researching new approaches to browsers, it's possible they didn't use Trident and started from scratch...?
Wikipedia Article https://en.wikipedia.org/wiki/Gazelle_(web_browser)
Official Promotion
2009-02-01
 The Multi-Principal OS Construction of the Gazelle Web Browser

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