Released Sleipnir 6 for Windows (6.1.5), Sleipnir 4 for Windows (4.4.1)!

category : for Windows, for Windows, Sleipnir 4, Sleipnir 6

Sleipnir for Windows

Hello, this is Ueda, a developer of Windows edition.

Today, We updated Sleipnir 6 for Windows(6.1.5) and Sleipnir 4 for Windows(4.4.1).
Those have some new features and updated Blink rendering engine.

Improvements in Sleipnir 6 for Windows(6.1.5)

New feature: “Search in this site”

Added “Search in this site” to SmartSearch.
* Only available when current page provides search box.

Private browsing

By selecting a tab group as private mode, you can browse privately the browser will not save any cookies and histories in this mode.

* right click menu on “Show your FavTabs” button
* right click menu on tab groups

Other improvements

We supported to hide chrome extension icon, improved Site Updates, added The Amazon 1Button App (

Please check release notes for detailed modifications.
 Sleipnir 6 for Windows release note

Improvements in Sleipnir 4 for Windows(4.4.1)

The problem that Sleipnir 4 for Widnows(4.4) did not start in some environments

Some users reported a problem that Sleipnir did not start, but it’s fixed in Sleipnir 4 for Windows (4.4.1).
Please update Sleipnir by the installer if you experience this problem.

Please check release notes for detailed modifications.
 Sleipnir 4 for Windows release note

Please consider to install PPAPI version of Flash

Blink rendering engine, which is used by Sleipnir, would no longer support NPAPI in the near future.
Therefore, if you don’t have PPAPI version of Flash, Sleipnir would fail playing movie.

To avoid this problem, download “FP 16 for Opera and Chromium -PPAPI” from the following URL and install it.

You can currently use NPAPI version of Flash, but please consider to install PPAPI version.

We will keep improving Sleipnir. Any reviews and reports are welcome.

SNS links

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