Sleipnir

Spec sheet

Product

Sleipnir 6 is a web browser designed for Windows and Mac.Read 11 Oct 2026 · fenrir-inc.com

Supported platforms

bothRead 23 Sep 2026 · fenrir-inc.com

Free plan

YesRead 23 Sep 2026 · fenrir-inc.com

Security

Fenrir's company security policy describes operating, monitoring, reviewing, maintaining, and continually improving its security management system.Read 11 Oct 2026 · fenrir-inc.com

Privacy

The maker says recommended articles are generated locally, so they do not raise privacy concerns.Read 11 Oct 2026 · fenrir-inc.com

Support

Fenrir directs visitors to its email form for inquiries and notes it may not be able to respond by phone.Read 11 Oct 2026 · fenrir-inc.com

Headquarters

Osaka, JapanRead 19 Oct 2026 · fenrir-inc.com

Founded

2002Read 19 Oct 2026 · fenrir-inc.com

Bookmarks

Sleipnir can synchronize bookmarks with Sleipnir on iPhone, iPad, Android, and Windows.Read 11 Oct 2026 · fenrir-inc.com

Browser engine

chromiumRead 23 Sep 2026 · fenrir-inc.com

Built-in ad blocking

YesRead 23 Sep 2026 · fenrir-inc.com

Compatibility

The browser uses the Blink engine, which the maker says is also used by Google Chrome.Read 11 Oct 2026 · fenrir-inc.com

Cross-device sync

YesRead 23 Sep 2026 · fenrir-inc.com

Extension support

chrome_storeRead 23 Sep 2026 · fenrir-inc.com

Extensions

Chrome extensions are supported on the Windows version; the Mac version currently does not support extensions.Read 11 Oct 2026 · fenrir-inc.com

Gestures

On Windows, users can use right-button mouse gestures to switch or close tabs, go back, reload, and restore closed tabs.Read 11 Oct 2026 · fenrir-inc.com

Mac limitation

The maker says the Mac App Store version omits some basic features because of App Store restrictions.Read 11 Oct 2026 · fenrir-inc.com

Mobile versions

Fenrir also offers Sleipnir Mobile for iPhone and Android, with finger gestures for browsing.Read 11 Oct 2026 · fenrir-inc.com

Reading

Sleipnir uses adjusted font rendering to make web text more beautiful and readable.Read 11 Oct 2026 · fenrir-inc.com

Search and navigation

The Portal Field searches and opens pages from search results, bookmarks, browsing history, and addresses.Read 11 Oct 2026 · fenrir-inc.com

Tab navigation

TiledTab displays large thumbnails of open tabs so users can survey and organize them.Read 11 Oct 2026 · fenrir-inc.com

Tabs

Tabs show page thumbnails, can be grouped by dragging, and related tabs can be grouped automatically.Read 11 Oct 2026 · fenrir-inc.com

Plans and prices

Every Sleipnir plan and price →

Where Specifiction places it

• Web browsers#27 of 1548.7