Bookmark Sync Firefox

Bookmark Sync

Sync bookmarks across Chrome, Edge and Firefox with end-to-end encryption

Features & Capabilities

Bookmark Sync keeps one bookmark tree across Chrome, Edge, and Firefox. Sign in with the same account in each browser and your bookmarks, folders, and ordering stay identical everywhere—no export/import files, no self-hosted server, and end-to-end encryption on by default.

Your browser's built-in sync only covers its own vendor. Bookmark Sync is the bridge between them: organize on Chrome at the office, open Firefox at home, and everything is already there.

WHY PEOPLE SWITCH TO IT

· Cross-browser by design: Two-way sync of bookmarks and folders between Chrome / Edge / Firefox. Add, rename, move, or reorder on one device and the others follow.

· True tree sync, not flattened paths: Folders keep their real hierarchy and order. Renaming or moving a folder never orphans its children, and the order you arrange is the order you get on every device.

· End-to-end encryption, on by default: Every change is encrypted on your device with AES-256-GCM before it leaves. The server stores ciphertext only, so neither we nor anyone else can read your bookmarks. One sync passphrase unlocks a new device—no long key to memorize.

· Merges instead of overwriting: Add, rename, move, or delete on two devices at once—both sides' additions are kept and neither device blindly overwrites the other. Offline changes merge once you are back online. A genuine conflict on the same item converges deterministically, so it never flips back and forth.

· Deletions that stay deleted: Removals propagate as tombstones, so a bookmark you deleted on your laptop will not reappear from stale data on your desktop.

· Spaces to separate work and life: Each space is an independent bookmark tree that never mixes (1 on Free, 3 on Plus, 10 on Pro).

· Device control: Every browser that syncs is listed; rename or unbind any of them whenever you want.

HOW TO START

  1. Install the extension in each browser you use.
  2. Sign in with the same account and set a sync passphrase.
  3. That is it—your full bookmark tree is pulled down and kept in sync from then on.
PRICING

Free forever: 500 bookmarks, 1 space, 3 devices, no credit card. Plus ($20/year): 10,000 bookmarks, 3 spaces, 6 devices. Pro ($50/year): unlimited bookmarks (about 250,000 cap), 10 spaces, 15 devices. Every tier has the exact same sync features—you only ever pay for capacity.

PRIVACY & SECURITY

· End-to-end encryption enabled by default; the server cannot read your bookmark content · Collects only your sign-in email and the minimum data needed for sync · Privacy policy: https://www.bookmark-sync.top/privacy

FAQ

Q: Do I need an account? A: Yes. Register with an email and password, then set a sync passphrase to start syncing.

Q: Which browsers are supported? A: Chrome, Edge, and Firefox (Manifest V3). Safari does not expose a bookmarks API, so it is not supported.

Q: Can I use it for free? A: Yes—500 bookmarks forever, with the same sync features as paid plans.

Q: How do I restore my bookmarks on a new device? A: Install the extension, sign in with the same account, and enter the same sync passphrase. Your full bookmark tree is pulled automatically.

Q: What happens if two devices change the same bookmark? A: They are merged automatically—additions from both devices are kept, and nothing is lost to a blind overwrite. If both devices move or rename the exact same item, every device converges to the same result.

Q: What if I forget my sync passphrase? A: The passphrase derives your key locally and is never uploaded—it is the only thing that can decrypt your data. If you lose it, the ciphertext in the cloud cannot be recovered, so keep it in a password manager.

Q: Is my data safe? A: Everything is encrypted on your device before upload. The server only ever holds ciphertext, so even a leak would not expose your bookmarks.

User Growth & Download Statistics

Manifest V3 Add-on
By:
catnuko
Daily users:
1
Version:
2.16.2 Last updated: 2026-10-15
Version code:
6581217
Creation date:
2026-09-13
Firefox add-on GUID:
bookmark-sync@bookmarksync.app
Firefox add-on numeric ID:
3071255
Firefox on Android:
Yes
Risk:
Low risk impact High risk likelihood
Permissions:
Host permissions:
  • https://*.supabase.co/*
Size:
396.30KB
Email:
su*****@bookmark-sync.top
Website:
Privacy policy:
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-10-16
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:
catnuko
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/bookmark-sync-app/
Email:
su*****@bookmark-sync.top
Website:
https://www.bookmark-sync.top

Is Bookmark Sync Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.
Low risk impactLow risk impact

Bookmark Sync requires very minimum permissions.

Risk impact analysis details
  • Medium Access to bookmarks may provide insights into user preferences and interests but generally carries low risk.
  • Medium ******* ****** ** *** ********* ******** ***********
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.
High risk likelihoodHigh risk likelihood

Bookmark Sync is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best Bookmark Sync Alternatives

Here are some Firefox add-ons that are similar to Bookmark Sync: