Developer's Blog

Sleipnir 3 for Mac (3.2) released! Ad-block added, and finally available in the Mac App Store!

Today, we have released the latest version for Sleipnir 3 for Mac (3.2)!
Finally, you can now download Sleipnir in the Mac App Store!

Download from the Mac App Store
Download the Black Edition from the product page

We have added ad-block support in the latest update. Hiding adverts that get in the way of your web browsing, to provide you with refreshingly easy-to-view websites is the style of Sleipnir. In addition to the Mac App Store release, we have also released the free Black Edition.
Please read the full details of this special release below.

The Mac App Store version and Black Edition

Sleipnir has made its debut in the Mac App Store! Notifications of updates provided from the App Store, re-installing apps you have downloaded in the past just requires selecting them from a list, and much more makes managing everything a lot easier. If you usually use the Mac App Store, then you can easily switch to the Mac App Store version of Sleipnir.

Also, we have released the Black Edition at the same time. This is the premium version of Sleipnir 3 for Mac that can be downloaded for free from the Fenrir inc. website.

Upon releasing Sleipnir 3 for Mac in the Mac App Store, due to some specific restrictions by the Mac App Store, we unfortunately have had to remove some basic functions. The Black Edition was released in order to provide Sleipnir 3 for Mac without being effected.

Also, you can use the powerful web creation tools only available for the Black Edition. Web Inspector that is also used on Safari and Chrome, is also one of the powerful support functions. Use it to see webpage construction, file composition, scripts, and loading times in full-view. Also, you can not forget the user agent functions. Just check them out from the [Development] menu.

The powerful development support function [Web Inspector] checking page elements.

The Black Edition can be downloaded for free from the product page as usual. Also, automatic updates are possible just like usual.
The version of Sleipnir you are using now will be updated to the Black Edition.


Have you ever thought how refreshing it would feel if those pesky adverts on sites on blogs just were not there? Those over-sized adverts taking up most of the page when you are in the middle of reading an article are just something you don’t need. Well, in Sleipnir 3 for Mac, we have just implemented ad-block to remove them for you.

Places where adverts were located become empty blocks, so it is easy to see it working. Without these adverts you can browse through web pages with a refreshing and relaxed feeling.

Import any kind of bookmarks

We have added support for importing HTML format bookmarks. HTML is a generic file format, and it can be used to write bookmarks from almost any browser, so it is now possible to import bookmarks using this from almost any browser.

Save web pages in full

Web pages can now be saved as web archives. Web archive pages are collected into one file so the information is kept neatly all together. Also, they are saved so they can be viewed properly on the web.

German language support added

We are very happy to let you know that German language support has been added for the Black Edition.
Thank you very much to Christian Rambow who kindly contributed the German translation.

Volunteer translators wanted:

We continue to look for volunteer translators to help provide our products to people around the world.
If you are interested, please send us a message to:

A sample of the file to be translated can be downloaded below:
(The actual file to be translated will be sent once the translation has been assigned to you.)
(The above file is a tab delimited UTF-8 encoded csv file.)

Target products:
・Sleipnir 3 for Windows
・Sleipnir 3 for Mac

Thank you.

Improvements and fixed issues

We have also included requested improvements and fixed issues.

– The operation when right-clicking in a web page improved
– Enable/disable gestures individually
– Issue where the progress bar became unable to be closed when logging in to Fenrir Pass fixed

Please try out the next level of power for Sleipnir 3 for Mac!

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