- The default showcase mode is "single window". "Showcase All Windows" mode is still available. Key shortcuts stay the same as in previous versions.
- Changed the "in a box" thumbnail style completely, and now it is the default style.
- Loaded images are rendered directly as a thumbnail (instead of a browser containing an image). This is specially useful for photo galleries.
- Added several enhancements to the tab bar (enabled by default, can be deactivated in the "Advanced" settings tab):
    - "List all tabs" default action will show a Showcase instance. Right clicking on it will show a popup that lists all the window tabs.
    - The tab bar arrows now have a tooltip that report the number of tabs in that side.
    - Double click on the tab bar arrows will scroll to the beginning or the end of the tab bar.
    - Tab bar arrows have a contextual menu that will show a popup with the tabs on that side of the tab bar.
    - Tab menu items in the popups now have a tooltip with the URL of that tab.
- Added the possibility in the settings panel to restore defaults, and import/export settings.
- Revamped the icon set to match better the new Firefox 2 default theme.
- The vertical scrollbar is now activated by default in all modes.
- Scrollbar is now only shown when necessary, allowing bigger thumbnails.
- The "+" and "-" keys will now zoom in or out all the thumbnails. Only works when scroll is activated.
- Thumbnails are updated when their represented browser is scrolled.
- New configuration option (in the advanced tab) to avoid closing a window when closing the last tab (will blank it instead).
- New configuration option to set the window size and/or position respect inner content area.
- Clicking on the thumbnail label will have the same effect as if you click on the thumbnail image.
- Added 2 new window attributes: "Dependent" (Showcase window depends on the parent one) and "Title bar" (show or hide the window title bar).
- Tweaked the default settings: size and position are now related to the content area, enabled some window attributes, thumbanails are bigger by default.
- If tooltip title and url are activated, the tooltip will show them in separate lines. This is also now the default mode.
- New thumbnail rendering modes available. Now it's possible to render thumbnails showing the top left of the tab page (without taking in account the current scroll position). Also, added another mode showing the top left position without scaling it down. This is configurable in the "Thumbnails" > "Appearance" settings tab.
- Added different text for toolbar button tooltips.
- Swapped the title statistics for global (all windows) mode. First number indicates total of tabs, and the second the number of windows.
- Colorize the tab is now an option, and is disabled by default (didn't work properly in Firefox 2).
- Added option to open a thumbnail on double click. Disabled by default.
- Better handling of represented windows resize.
- Blank thumbnails (about:blank) are rendered instantly.
- Added configuration options to disable IE Tab, full-screen plugins, blank pages and images detection.
- Full screen command in Showcase tab will activate full screen in it's window.
- SeaMonkey Showcase will report that xSidebar is required to show the preferences dialog when necessary.
- Improved the build process, generating a smaller file.
- Find bar synchronization in Showcase tab wasn't working well with Firefox 2.
- Solved conflict between special thumbnail detection and cached thumbnails.
- Fixed crashing bug related to thumbnail cache in some special cases.
- Re-added missing icons in SeaMonkey Showcase.
- Corrected Showcase sidebar title.
- Solved a small bug when refreshing the configuration.
- Fixed crashing bug in Firefox 1.5 when not showing labels in thumbnails.
- Fixed the options to close Showcase when the focus is lost.
- Fixed the option to close a thumbnail with any mouse button other than the middle one.
- Fixed a compatibility issue between Showcase Sidebar and All-in-One Sidebar.
- Added Persian (fa-IR, by Bahram Maravandi) and Korean (ko-KR, by jeongsw) localizations. Simplified Chinese (zh-CN) updated by Mozine.cn .

Changes in this version:
- Compatible with Firefox 3 alpha 7 (Gran Paradiso).
- Korean translation updated by Jeong Seungwon.
- Disabled a window attribute by default (which was problematic with Firefox 3).
- Small fix to tab bar button (tab popup menu was visible for a moment).
- Solved bugs in keyboard controls when using tab search.