Sleipnir
Sleipnir is a lightweight web browser for macOS, designed as a fast and customisable alternative to mainstream browsers. It emphasises tabbed browsing, mouse gesture controls, and a compact interface. The app targets users who prefer a less resource-intensive browsing experience or who favour keyboard and mouse gesture shortcuts for navigation. Sleipnir is developed by Fenrir Inc., a Japanese software company known for creating niche productivity and browsing tools.
AI Recommendation
1 suggestionSleipnir appears to be inactive or abandoned. The most recent version we can identify is 4.5.10, which was released in early 2023 — nearly three years ago — and the vendor's website and social presence show no signs of ongoing development or updates. There is no evidence of a native Apple Silicon build. Sleipnir will continue to run under Rosetta 2 today, but when Apple removes Rosetta from macOS 28 in September 2028, this app will stop launching entirely. Given the age of the last release and the lack of any native build, it is unlikely the vendor will ship an update before that deadline. If you depend on Sleipnir's features, consider transitioning to an actively maintained native browser such as Safari (built into macOS and optimised for Apple Silicon), Firefox, Chrome, or Brave — all ship native Apple Silicon builds and receive regular security updates. If you rely on Sleipnir's specific mouse gesture controls or keyboard shortcuts, check whether your preferred replacement browser offers similar customisation, or use a dedicated gesture utility like Buildwatch or Tes to replicate critical workflows.
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