(日本語版)

TST provides an API for other extensions. Some extend the behavior of TST's sidebar panel:

• Multiple Tab Handler allows you to select multiple tabs with long-press on tabs. It also allows you to close multiple tabs with long-press on the closebox on tabs.
• TST Active Tab in Collapsed Tree shows a small tab on a collapsed tree as an alias for the last active tab under the tree.
• TST Active Tab on Scroll Bar shows a marker to indicate the position of the active tab, on the scrollbar.
• TST Auto Group Tabs provides ability to group newly opened tabs automatically in various conditions.
• TST Auto Sticky Tabs provides ability to stick some state tabs to tab bar edges automatically.
• TST Bookmarks Subpanel allows you to show a small "Bookmarks" sidebar panel below tabs in the TST's sidebar.
• TST Indent Line provides indent line like Visual Studio Code. This requires TST 3.9.0 and later.
• TST Lock Tree Collapsed allows you to lock arbitrary trees as collapsed. (This was a built-in feature on TST 3.3.0-3.3.6, and now separated.)
• TST More Tree Commands provides more context menu and keyboard shortcut commands to manipulate TST's tree.
• TST Open Bookmarks as Partial Tree allows you to open only some bookmarks in a folder as a partial tree. Moreover, it also provides ability to open tree of container tabs from bookmarks.
• TST Tab Drag Handle provides a small tooltip on tab labels to start dragging of tabs for specific operations. (This was a built-in feature on TST 2.6.0-3.3.6, and now separated.)

• Add Last Active Class To Tab helps you to give custom appearance for the "previously active tab".
• Auto Tab Discard supports the fake context menu in the Tree Style Tab sidebar.
• Bookmark Tree for Tree Style Tab allows you to bookmark and restore trees. (A similar feature is now built-in in TST since v3.2.0)
• Move unloaded tabs for Tree Style Tab allows you to move tabs in the sidebar without them becoming active.
• Parent Tab Switcher allows you to move focus between parent level tabs with keyboard shortcuts.
• Tab flip for Tree Style Tab allows you to move focus to the tab previously focused, by clicking on the active tab.
• Tab Unloader for Tree Style Tab allows you to unload tabs by clicking on them in the sidebar.
• Toggle Native Tab Bar provides ability to toggle visibility of the horizontal tab bar, with a userChrome.css rule specially for the addon.
• Tree Style Tab Focus Preceding Tab on Close focuses the previous tab instead of the next tab when a tab is closed.
• Tree Style Tab in Separate Window allows you to open the Tree Style Tab sidebar page in a new window.
• Tree Style Tab Mouse Wheel allows you to switch active tab by wheel scrolling.
• TST Active and Total Tabs Counter tracks your active (non-discarded) and total tabs by window and in total and places the information on the TST new tab button.
• TST Change Close Tab Button Behavior allows you to close the parent and its all descendants with a middle-click on the closebox of a parent tab, whether the tree is expanded or collapsed.
• TST Colored Tabs gives custom background color for tabs based on their domain.
• TST Colorize Tabs allows to set individual color for each tab in order to highlight it.
• TST Mark Tabs allows manually setting background colors for tabs using the context menu.
• TST Fade Old Tabs sorts all tabs in 3 categories – 'recent', 'older' and 'oldest' by latest visit time, and applies different opacity to them.
• TST Folder Expand Collapse allows to collapse/expand "group tab"'s subtree by single click, without activating the tab.
• TST Hoverswitch allows you to switch tabs by hovering over them.
• TST insert as next root sibling put the new tab as the next root sibling in the tree.
• TST Lock locks Ctrl-Shift-Click-ed tabs to prevent accidental close.
• TST-MiddleClick allows you to run "undo close tab" or "close currently active tab" command on middle click on the sidebar.
• TST New Tabs First puts a newly opened root level at the top of the sidebar.
• TST Number Navigation provides shortcuts to focus to only visible (not collapsed in the TST sidebar) tabs specified with the index number.
• TST Select Random Tab adds a context menu option for selecting a random tab in a Tree Style Tab tree.
• tst-tabcount places a tab number on each tab.
• TST Tab Favorites marks frequently visited tabs as favorites and quickly navigate between them using hotkeys.
• TST Tab Search provides a search field (as a subpanel) to filter opened tabs in the sidebar.
• UnloadTabs supports the fake context menu in the Tree Style Tab sidebar.
• TST New Tab On Double Click Open a new tab when double clicking on an existing tab