KeepSync

Name: KeepSync
Author: Lachlan

By: Lachlan

Sync tabs, bookmarks and history between browsers using your own server. Self-hosted, open source, privacy-first.

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Install

Features & Capabilities

KeepSync keeps your browsing in sync across browsers using a self-hosted server you control. No third-party cloud, no telemetry, no accounts.

Features:

Tab sync — Your open tabs appear across all paired browsers in near real time.
Bookmark sync — Full bookmark tree synchronization, preserving folder structure and ordering.
History sync — Recent browsing history is merged so nothing gets lost when switching devices.
Device pairing — Pair new browsers via invite tokens (first device) or in-app pairing codes (subsequent devices).
Self-hosted server — A single Go binary with SQLite. Run it on a Raspberry Pi, VPS, or your home NAS.
Privacy-first — All data stays on your server. No external services, no tracking, no accounts. The extension source is fully auditable.

Quick start:

Deploy the server (see GitHub for Docker, systemd, or bare-metal instructions).
Install the extension in your browsers.
Point each browser at your server and pair them.

KeepSync is free and open source (MIT). Contributions and feedback are welcome on GitHub.

User Growth & Download Statistics

Add-on

By:

Lachlan

Daily users:

Version:

1.0.0 Last updated: 2026-05-12

Version code:

6253521

Creation date:

2026-05-09

Risk:

Permissions:

Host permissions:

http://localhost/*
https://*/*
http://*/*

Size:

85.17KB

Email:

em*****@lachlanallison.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-14

Compare stats and ranking:

Ranking

# 97,742 ▲ 1,112

Other rankings

#134 in keep keyword 60 #151 in sync keyword 43 ▲ 2

For Developers

Monetize with App Pass Boost with Extension Booster

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:

Lachlan

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/keepsync/

Email:

em*****@lachlanallison.com

Website:

https://lachlanallison.com

Is KeepSync 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.

KeepSync requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
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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.

KeepSync 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 has low user count. Unpopular extensions may not be stable or safe.
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