Tabernacle by Michael Projects

Tabernacle is a tab manager for Firefox with vertical tabs in a sidebar. Organize tab groups into folders and subfolders, keep related pages in collapsible tab trees, and search open tabs by title or URL.

Use it as a tab organizer for work, research or everyday browsing:

• Group tabs into folders and subfolders, and focus on one folder at a time.
• Arrange tree tabs with drag and drop to move or nest related pages.
• Search tab titles, URLs and folder names, including in collapsed folders.
• Use Firefox containers to keep sign-ins separate, with default containers for folders.
• Keep pinned tabs and folders visible, and mute tabs playing audio.
• Revisit viewed tabs and folders, and reopen recently closed tabs from recent activity.
• Follow your Firefox theme or choose a light or dark monochrome sidebar.
• Export and import your folder structure. Folder backups do not include tabs or browsing activity.

Requires Firefox 142 or newer.