Tree Style Tab Files

4.1.11 (2025.5.29):

• Keep the height of the pinned tabs area resizeable even if it was shrunken to zero.
• Don';t shrink the height of the pinned tabs area to zero at the startup after it was manually resized.

4.1.10 (2025.5.27):

• Invoke commands in the fake context menu (shown by Multiple Tab Handler addon and so on) correctly. It was regressed for a long time.

4.1.9 (2025.5.25):

• The height of pinned tabs container is now resizable by dragging. Double-click on the resizer restores the auto calculated height.

4.1.8 (2025.5.24):

• Update localized labels of the context menu command "Unload Tab".
• Fix misfocusing after "Unload Tab" is invoked.
• Revert "show closebox in tabs only for active or hover" behavior for inverted appearance mode for non-default sidebar position, to reduce stressfull jumping of tab icons and labels.
• Add a new expert option to control fallback behavior of collapsed descendants tooltip. (You can enfoce to show collapsed descendants with in-sidebar tab preview panel.)
• Add expert option UIs for fadeOutPendingTabs and fadeOutDiscardedTabs previously implemented.

4.1.7 (2025.5.16):

• Show closebox in tabs only when it is active or hover, like Firefox's native vertical tabs.
• Suppress tab preview panels while dragging.
• Move dropped tab correctly when a tab is dropped after a collapsed tree at the end of the tab bar.
• Highlight active tab correctly after the active tab is moved across windows by Firefox's native tab bar.
• Add "Unload Tab" context menu command simulating the one on Firefox 140. Two secret options fadeOutPendingTabs (corresponding to browser.tabs.fadeOutUnloadedTabs) and fadeOutDiscardedTabs (corresponding to browser.tabs.fadeOutExplicitlyUnloadedTabs) are also introduced.