Sleipnir (web browser)
web browser developed by Fenrir Inc
Sleipnir is a tabbed web browser developed by Fenrir Inc. The browser's main features are customization and tab functions. It supports HTML5 and multiple layout engines.
The names Sleipnir and Fenrir are both names of animals from Norse mythology.
Sleipnir was originally created in Japanese and then released with English and Chinese translations. Further translations are performed by volunteer translators.
It is available for Microsoft Windows, Android and select regions for iOS. Older versions for macOS are available on third-party websites. Older versions were available for Windows Phone, prior to the shutdown of the Windows Phone Store.
History
Sleipnir was originally developed by Yasuyuki Kashiwagi. In November 2004, the computer containing Sleipnir's source code was stolen.
“Sleipnir (web browser)” enters the record as web browser developed by Fenrir Inc. Crown Archives preserves that source wording while asking what Sleipnir, browser and developed can confirm, complicate or overturn.
Why this record matters
“Sleipnir (web browser)” is worth following because a concise public description often conceals a longer documentary argument. Here, Sleipnir, browser and developed provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Apr 20, 2026. The linked authority identifier is Q1196833. None of the 3 selected statements returned an explicit reference. The first chronological checks are 2004.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
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The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Sleipnir (web browser)”, its source revision and the description used here.
- Expand the search: follow Sleipnir (web browser) primary sources, Sleipnir (web browser) archive and Sleipnir research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
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- Which institution is responsible for the underlying evidence?
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This entry incorporates text from “Sleipnir (web browser)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.