Tab Shelf

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Improvements

• Handles large tab sessions more smoothly by rendering fewer off-screen tab rows, including large pinned-tab sets.
• Tab rows now keep extra action buttons lightweight until they are needed, such as on hover, focus, or selection.
• Tab Tray now uses less memory when disabled or minimized.
• Background tab updates now avoid unnecessary processing when browser changes are only cosmetic.
• Tab search, saved-session actions, and favicon handling now use lighter data paths to reduce memory use during long browsing sessions.
• Selection checkboxes now look and behave more consistently across tab rows, saves, bookmarks, grouping rules, and grouping rule sites.

Bug fixes

• Fixed noisy tab updates causing avoidable background work.
• Fixed selected tab rows rerendering unnecessarily when unrelated selection state changed.
• Fixed favicon cache growth being limited only by entry count instead of approximate retained size.
• Fixed disabled Tab Tray still doing avoidable background UI work.
• Fixed some split-view drag-and-drop confirmation paths retaining stale drop state after failure.
• Fixed selection controls losing right-click menu handling when secondary row actions were hidden.