一款以 MSIE 为基准的、集成化、个性化的多窗口(MDI)浏览器软件。符合免费、绿色的软件新潮流。目前，它除了已具备各种 IE 基准浏览器的常用功能之外，更吸取了其它非 IE 基准浏览器的优秀特性，并加以改进和创新。软件赋予了用户丰富和灵活的定制权限，这甚至超出了初次使用者的想象。Sleipnir 是日本人认为世界第一的浏览器，它是以 IE 为核心，并整合 NetCaptor、Opera、Netscape 三家浏览器的优点于一身，变成功能超强的浏览器，别家有的功能，它几乎都有，而它有的功能，别家却不一定有，更具备超强的指令码编辑能力，可模拟其它浏览器的好用功能并可让使用者自行设计新功能，等于无所不包。
Added [Back](Top-right), [Forward](Top-left) in TouchPaging.
Added [Customize] > [Mouse] > [Mouse assignments].
Issue where the program would freeze or become unresponsive when switching tab groups with eco mode enabled has been improved.
Added [Do not display next time] to the message when closing tabs inside locked tab groups.
Added [Close all tabs to right][Close all tabs to left] to [Customize UI] > [Button].
4(14% of all reported issues) forced termination issues fixed based on FeedbackAgent data.
Issue where the browser could not be restored after being minimized fixed.
Issue where a different tab would refresh when trying to refresh an inactive tab fixed.
Issue where folder icons would not be displayed properly when [Close all except active tree] is enabled fixed.
Issue where the way selected operations from the right-click menu of the security button performed has been fixed.
Issue where the menu would be displayed by default after closing the program while displaying the menu with the ALT key and then restarting the program has been fixed.
Issue where some Favicons could not be correctly acquired fixed.
Issue where messages would be incorrect after overwriting gesture actions has been fixed.
Issue where the state of the Back/Forward buttons has not been updated after tab groups are switched between has been fixed.
版本 3.0.8 （18.104.22.16800）｜2012/02/03
Quick security settings added to customize.
Default security settings for Trident added to customize.
Fixed FeedbackAgent issues.
版本 3.0.7 （22.214.171.12400）｜2012/01/31
Active tabs changed to be prioritized when loading tabs.
Speed when opening tabs from the bookmarks bar optimized.
Changes made so that it is confirmed whether it is appropriate to terminate the client when it has been detected that the user-interface has frozen.
4 forced termination issues fixed based on data provided by the FeedbackAgent.
The issue where mouse gestures and TouchPaging could not start has been fixed.
The issue where the order of tab groups would change after being restarted has been fixed.
The issue where the order of the search history would change after being restarted has been fixed.
The issue where groups could be displayed in the wrong position when clicking the add tab group button has been fixed.
The issue where protected tab groups would close when tabs in those groups were close has been fixed.
The issue where the positioning of created bookmarks is out of place when tabs are dropped in the bookmarks bar has been fixed.
The issue where the menu bar would not display when the window is minimized and then restored has been fixed.
The issue where the window could sometimes not be restored after minimizing it has been fixed.
The issue where when an extremely high value is inputted into the options an incorrect action occurs has been fixed.
The issue where some of the options in Windows XP/IE6 could not be displayed properly has been fixed.
The issue where an error would occur when switching to GeckoViewer if using certain anti-virus software has been fixed.
版本 3.0.6 （126.96.36.19900）｜2012/01/23
Bookmark panel icons partially changed.
Unsorted folder changed to not be displayed in the bookmark panel when not necessary.
[Add bookmark] added to the bookmark menu.
The conditions for recognizing URLs in the address bar when in full-screen mode has been made stricter.
The issue where operations become unresponsive when synchronizing with FenrirFS has been fixed.
3 issues causing force termination of the program based on data received from the FeedbackAgent has been fixed.
The issue where the focus moved when loading unactive tabs has been fixed.
The issue where operated incorrectly when a tablet is included when organizing tabs into groups has been fixed.
The issues where the "ShowBookmarkPanel" and "ShowHistoryPanel" actions did not work have been fixed.
The issue where the RoboForm tool bar displayed an error message when closing tab groups in certain environments has been fixed.
The issue where a force termination would occur if you try to open "bookmark://bookmarks/" when using Geck Viewer has been fixed.
The issue where switching between tabs could not be performed with the mouse wheel when tab pop-ups are displayed has been fixed.
The issue where an error would occur on uninstallation has been fixed.
版本 3.0.5 （188.8.131.5200）｜2012/01/12
The issue where the browser would stop working properly when closing tabs, etc., has been improved.
Operations upon clicking some links has been made to work just like in IE.
Links from mailers, etc., have been modified to be displayed properly.
[View]->[Encode]->Unicode(UTF-7) has been deleted from the command bar.
FenrirFS synchronization has been improved.
4 forced termination bugs fixed from FeedbackAgent data.
Issue where files could not be opened from other applications as related in XP has been fixed.
Issue where the panel that is shown when the F1 key is pressed is incorrectly displayed , has been fixed.
The inaccurate message that is displayed when Sleipnir fails to restart has been rectified.
Strange translations have been rectified.
版本 3.0.4 （184.108.40.20600）｜2011/12/20
Chinese user interface support added.
Changes immediately reflected in file when bookmarks are edited.
Issue where the program would force a termination at random times has been fixed.
Leakage when used for long periods of time has been reduced by reusing threads.
Issue where the order would not be maintained when synchronizing bookmarks with Fenrir Pass has been fixed.
Issue where when synchronizing bookmarks with FenrirFS, an error would occur, has been fixed.
Issue where when using Roboform 7.6.6, after closing, a forced termination would occur, has been fixed.
Issue where the search bar is not selected when the search bar is clicked and activated, has been fixed.
版本 3.0.3 （220.127.116.1100）｜2011/12/12
改善了与 FenrirFS 的同步操作。
修正了在解析 OpenSearch 之后，有时出现强行终止的问题。
修正了在使用 Roboform 时，有时出现的调出菜单栏则掉线的问题。
修正了使用 Gecko 时，有时出现的鼠标返回按键等需要执行两次的问题。
修正了在显示自定义画面时，却能够使用 TouchPaging 的问题。
版本 3.0.2 （18.104.22.16800）｜2011/11/30
实现了通过自定义 | 语言 | 用户界面，使用语言可以通过用户界面进行选择的功能。
修正了在单击链接并打开新标签页时，与期待的相反，有时可能 about:blank 被打开的问题。
修正了在从自定义 | 启动 | 主面 | 结束 | 互联网中进行历史记录的删除时出现的无法操作的问题。
修正了在使用 FenrirFS 书签时，如果从菜单删除书签则会出现内存泄漏的问题。
修正了在标题栏中能够开始 TouchPaging 的问题。
版本 3.0.1 （22.214.171.12400）｜2011/11/18
修正了当渲染引擎为 Gecko 时，无法显示页内检索栏的问题。