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Export Arc bookmarks to Firefox

Firefox is privacy-focused and open-source. Here's how to bring your Arc sidebar — Spaces, folders, everything — into Firefox before Arc shuts down December 22, 2026.

Step 1: Get your Arc data

Option A: StorableSidebar.json (best for structure)

1. Close Arc
2. Mac: Finder → Go → Go to Folder → ~/Library/Application Support/Arc/
3. Windows: Win+R → %LOCALAPPDATA%\Packages\ → folder starting with TheBrowserCompany.Arc → LocalCache\Local\Arc\
4. Copy StorableSidebar.json

Option B: Arc's export

1. In Arc: File → Export Data
2. Save Arc Data Export.md

Step 2: Convert

1. Go to the converter
2. Drop your file
3. Preview to verify
4. Pay $7 and download bookmarks.html

Step 3: Import to Firefox

1. Open Firefox
2. Press Ctrl+Shift+O (Windows/Linux) or Cmd+Shift+O (Mac)
3. Click Import and Backup
4. Select Import Bookmarks from HTML…
5. Choose bookmarks.html
6. Click Open

All your Spaces appear as folders under "Arc Import" in Firefox bookmarks.

What transfers

• All Spaces (each becomes a folder)
• Pinned tabs
• Nested folders
• Favorites
• Unpinned tabs
• Split Views

Why not Firefox's built-in import?

Firefox can import from Chrome, Safari, and Edge, but not Arc. Arc only exports Markdown, not standard HTML bookmarks.

For a free option, try Dia (The Browser Company's new browser with built-in Arc import).