Deja Bookmarks by Synthea

A powerful tree-style bookmark manager in the Firefox sidebar. Search, organize and drag-and-drop bookmarks; manage tabs and tab groups; mark favorites; run tab macros; advanced tab search; import/export as HTML or Markdown.

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About this extension

Deja Bookmarks turns your bookmarks into a fast, fully navigable tree right in the Firefox sidebar — and adds powerful tab management on top.

Bookmarks

Tree view of all your bookmarks and folders in the sidebar
Instant search by name, URL or folder, plus filter by domain
Drag-and-drop to reorder and move items between folders
Create folders and bookmarks, rename, and multi-select to move, export or delete
Mark folders and bookmarks as favorites for one-click access

Tabs & tab groups

See all open tabs grouped, filter them, and select in bulk
Save selected tabs to any folder (duplicates skipped automatically)
Open a folder's bookmarks as a new tab group
Advanced tab search: duplicates by URL, occurrences per domain, old/unvisited tabs, tabs already bookmarked, tabs with no title, and tabs playing audio

Macros

Automate tab cleanup: close exact URLs or remove duplicate tabs
Optionally run macros automatically when the browser starts

Import / Export

Import bookmarks from an HTML file
Export selections or everything as HTML, or copy as Markdown

Privacy

No data collection, no tracking, no external servers — everything stays in your browser.

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Deja Bookmarks by Synthea

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