About Sync

Name: About Sync
Rating: 4.7 (20 reviews)
Author: Mark Hammond

Show information about Firefox Sync. This addon shows information about your Sync account, including showing all server data for your account. It is designed primarily for Sync developers or advanced users.

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Features & Capabilities

About Sync is a Chrome extension designed for Firefox Sync developers and advanced users who want to access detailed information about their Sync account. Once installed, users can simply navigate to about:sync in the address bar to view all server data linked to their Sync account. The extension provides valuable insights into synchronization details, facilitating better understanding and troubleshooting.

The extension is open-source, with its code hosted on GitHub, encouraging developers to contribute via pull requests. About Sync empowers advanced users to manage and analyze Firefox Sync data efficiently through a clear and accessible interface.

User Growth & Download Statistics

Add-on Developer Tools Privacy & Security

By:

Daily users:

Rating:

Version:

0.25.20250227.104629 Last updated: 2025-02-27

Version code:

5900904

Creation date:

2016-03-30

Risk:

Permissions:

mozillaAddons

Size:

208.47KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-15

Compare stats and ranking:

Ranking

# 1,718 ▼ 13

Other rankings

#275 in Other extensions ▼ 4

#3 in sync keyword 43

#62 in include keyword 20

#116 in pull keyword 3 ▼ 1

#119 in server keyword 62 ▼ 2

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For Developers

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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:

Mark Hammond

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/about-sync/

Website:

https://github.com/mozilla-extensions/aboutsync

User Reviews

Users appreciate About Sync for its ability to reset sync history quickly and restore synced tabs, making it easier to manage sync issues across browsers, including private sync servers. However, some find it not very user-friendly, feeling it's more targeted at developers. There is a desire for features like reporting sync failures to Mozilla and support for Firefox on Android.

Pros

Helps reset sync history easily with one click
Useful for restoring synced tabs
Assists in identifying sync issues between browsers
Facilitates checking of private sync servers

Cons

Not user-friendly, appears designed more for developers
Lacks an option to report sync failures directly to Mozilla
No support for Firefox for Android

Recent reviews

by ja*****, 2026-04-10

by co*****, 2026-02-13

Awesome! Thank you!😃 My main use for this extension is to save all open tabs from my phone. I copy them as a JSON string and paste them into SyncedJSONtoOnetab If you're interested, you can find the SyncedJSONtoOnetab repository and use it to save tabs in Onetab format.

by Al*****, 2025-12-08

View all user reviews ›

Is About 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.

About Sync does not require any sensitive permissions.

Risk impact analysis details

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.

About Sync has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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