Basilisk (web browser)

Basilisk running on Windows 10
Developer(s) M.C. Straver[1]
Initial release November 17, 2017 (2017-11-17)
Stable release 2018.07.18 (18 July 2018 (2018-07-18)[2]) [±]
Development status Active
Written in C/C++, CSS, JavaScript, XUL
Operating system Windows 7 or later, Linux
Engines Goanna, SpiderMonkey
Platform IA-32, x86-64
Type Web browser
News aggregator
MPL 2.0

Basilisk is an open-source web browser created by the developers of the Pale Moon browser.[3][4] First released in November 2017,[3] Basilisk is a perpetual beta program intended to refine the underlying browser platform.[5][6] There are releases for Microsoft Windows and Linux.[7]

Like Pale Moon, Basilisk is a fork of Firefox with substantial divergence.[8] Basilisk has the user interface of the Firefox version 29–56 era (unlike Pale Moon, which has the Firefox 4–28 interface).

For add-ons, Basilisk has roughly similar support as Pale Moon for XUL/XPCOM extensions[9] and NPAPI plugins, all of which are no longer supported in Firefox. Unlike Pale Moon Basilisk has some support for WebExtensions and DRM.[3]


  1. M.C. Straver. "About Moonchild Productions".
  2. "Basilisk: release notes". Basilisk.
  3. 1 2 3 "Pale Moon team releases first version of Basilisk browser". 2017-11-17. Retrieved 2017-11-20.
  4. "Pale Moon staff releases first model of Basilisk browser". Tech News Port. 2017-11-17. Retrieved 2017-11-22.
  5. M.C. Straver. "Basilisk web browser". Retrieved 2017-11-17.
  6. M.C. Straver (2018-04-20). "Basilisk's nature (a small clarification)".
  7. M.C. Straver. "Basilisk: requirements". Retrieved 2017-11-22.
  8. M.C. Straver. "Basilisk features". Retrieved 2017-11-18.
  9. Note that technical differences between Basilisk and Pale Moon, such as the respective user interfaces, can result in specific extensions not working exactly the same in both. These details are outside the scope of this article.
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