Security Alert: Critical Security Risk

Automated analysis found severe security findings in this version. Review the Security Analysis tab before trusting this extension.Extension: TabSync Pro

CRITICAL RISK

TabSync Pro

ID: jdlfehkflgfmniokcligbfdjobgapehn

Supported Languages

🇺🇸English

Extension Info & Metadata

Status

Active

Version

3.1

Size

0.15 MB

Rating

3.8/5

Reviews

Users

1,000

Type

Extension

Updated

Mar 21, 2024

Publisher Contextual Analysis

Trusted

Author: https://fastaddons.com/View Profile
Privacy: Privacy Policy
MX records exist: Yes
Domain exists: Yes
Is disposable: No
Is role-based: Yes
Mailbox exists: Yes
Website: Visit

Total Extensions

Active

Obsolete

Listed

Unlisted

Total Users

99,017

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Manage your tabs between devices and access them anywhere through cloud.

☯ TabSync Pro - access, manage and synchronize your tabs between devices and browsers. ☁ Cloud account is required, but you can use your existing Gmail / Facebook / Twitter account: https://tabsync.fastaddons.com/ ⭐ TOP FEATURES: - tab management - organize tabs remotely - Cloud tabs - access your tabs on all your devices even when they are offline - using any web-browser, including your phone: https://tabsync.fastaddons.com/cloud ❤ About author - Juraj Mäsiar: https://blog.mozilla.org/addons/2020/06/15/Friend-Of-Add-ons-Juraj-Masiar/ ☕ I'm extension developer since 2016 and my goal is to build powerful extensions for your web-browser to make you more productive. If you think I'm doing a good job, please donate :) - Ko-Fi.com: https://ko-fi.com/fastaddons - PayPal.Me: https://paypal.me/fastaddons/ - Patreon.com: https://www.patreon.com/fastaddons 💥 Thank you for supporting my work! 🔒 Privacy Policy (2024): - I'm doing my best to protect all users data - nobody else has access to your data, except you - there is no history, no tracking, no analytics, no ads, no 3rd party services - my cloud server is hosted at professional VPS provider Tilaa.com in Amsterdam, Netherlands

User Growth

Showing data from Jan 01, 2022 to Dec 31, 2022

Versions

No change in user count

Compared to 3 months ago

3 versions released in this period

Rating Count

Total: 5 ratings

Average Rating

Current: 4.80 / 5.0+0.13

Extracted Data

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By severity

Critical1

High3

Medium1

Low0

Versions scanned

Showing 1 of 8 scanned versions with more than one unique finding. Counts are unique findings that include each version.

Extension Version	Code Review Findings
3.1 Code review	5

Extension Version	Code Review Findings
3.1	5

Files with findings

2 distinct paths — top paths by unique finding count:

background_ts.worker.js4
content_script/content_script.js1

S.No.	Category	Severity	File	Summary	Found in Version
1	Privilege Escalation	critical	background_ts.worker.js (line 1941)	A persistent Socket.IO WebSocket connection is established to `https://tabsync.fastaddons.com/api/socket.io` using the stored bearer token. The remote server can push `deviceUpdate` events containing `pendingSteps` (c…	3.1
2	Data Exfiltration	high	background_ts.worker.js (line 2059)	The extension collects all open windows and tabs — including their full URLs, titles, favicon URLs, active/pinned state — via `loadWindowsData()` and POSTs them to `https://tabsync.fastaddons.com/api/device` on every …	3.1
3	Data Exfiltration	high	background_ts.worker.js (line 2026)	An alarm named `sync_tabs` is created on extension startup that fires every 25 minutes unconditionally, triggering a full upload of all open tab URLs and titles to the remote server. Additionally, a window-removal lis…	3.1
4	Unauthorized Data Collection	high	content_script/content_script.js (line 1)	The content script runs at `document_start` on `https://tabsync.fastaddons.com/*` and listens for a `tab_sync_login_token` message posted by the page, then relays the token directly into the extension's background aut…	3.1
5	Unauthorized Data Collection	medium	background_ts.worker.js (line 525)	A bearer authentication token is persisted in `browser.storage.local` under the key `_bearer_tkn_` and loaded into memory on startup. Every subsequent REST API call to `https://tabsync.fastaddons.com/api/*` — includin…	3.1

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URLs

IPv4

IPv6

URLs

View the external URLs this extension communicates with to understand its network activity and data interactions.

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tabsync.fastaddons.com	-	https://tabsync.fastaddons.com
socket.io	/docs/v3/migrating-from-2-x-to-3-0/	https://socket.io/docs/v3/migrating-from-2-x-to-3-0/
www.w3.org	/2000/svg	http://www.w3.org/2000/svg
www.google.com	/s2/favicons	https://www.google.com/s2/favicons?sz=32&domain_url=${o}`:e}function
fastaddons.com	-	https://fastaddons.com/
tabsync.fastaddons.com	/cloud	https://tabsync.fastaddons.com/cloud
clients2.google.com	/service/update2/crx	https://clients2.google.com/service/update2/crx
tabsync.fastaddons.com	/*	https://tabsync.fastaddons.com/*
www.w3.org	/1999/xlink	http://www.w3.org/1999/xlink
addons.mozilla.org	/addon/tabsync-pro/reviews/	https://addons.mozilla.org/addon/tabsync-pro/reviews/

Showing 1 to 10 of 20 rows

Rows per page:

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13.254.116.52	IPv4	-
1.168.14.25	IPv4	-
224.32.47.62	IPv4	-

2.8 out of 5 · 10 most recent reviews

Text reviews

Positive

Negative

showing 0 tabs open on android flowsurf browser. please fix fast. thanks

Fahad Bin Hussain·13 Feb 2026

- does not name windows and cannot name. - does not save tab groups - can sync between Chromium devices liek Quetta, but cannot open multiple tabs at once. have to manually open one tab at a time

Ashish Alexander·25 Jun 2025

does not name windows and cannot name. does not save tab groups

Version History

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Code Diff

Compare extension code between any two versions.

0 changed files detected

No comparable text files found between these versions.

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Browse and explore files within this extension package

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Security Alert: Critical Security Risk

TabSync Pro

Supported Languages

Extension Info & Metadata

Publisher Contextual Analysis

Chrome Web Store Metadata

Screenshots & Videos

About this extension

Analytics & Metrics

User Growth

Rating Count

Average Rating

Static Code Security Analysis

Extracted Data

Code Review Findings Summary Across 8 Versions5

Versions scanned

Files with findings

Extracted Indicators (URLs and IPs)

URLs

Contextual Analysis

User Reviews

Version History

Version-to-Version Code Diff

Code Diff

Extension Files

User Reviews

User Growth

Rating Count

Average Rating