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Tab Session Manager

WebExtensions for restoring and saving window / tab states

Privacy Policy of Tab Session Manager

Effective Date: March 31, 2020

1. Introduction

This page describes the Privacy Policy that applies to all information collected or submitted when you install or use Tab Session Manager (“TSM”).

The TSM is owned and operated by Sienori - a developer from Japan (referred to herein as “we”, “us”, or “our”). We take the protection of your personal data very seriously and will always offer you the TSM and its functionality with your privacy in mind.

2. User information handled by the TSM

Session data

You can use the TSM to save open windows and tabs. Session data includes page title, URL, access date, tab order, etc.
Session data is stored only on local storage and never sent to an external server unless you have enabled the “Cloud sync” function.

Setting data

You can change the settings on settings page of the TSM to customize the TSM behavior.
Setting data is stored only on local storage and never sent to an external server.

3. External service

The TSM uses external services in the following cases:

When using the “Cloud sync” function

If you enable “Cloud sync” function, you can sync session data between different computers using Google Drive.
In that case,

TSM uses Google APIs in accordance with Google API policies.
Google API User Data Policy

Please refer to the following link for Google’s privacy policy.
Google Privacy Policy

When using the “Import URL list” function

You can import the list of URLs as a session using “Import URL list” function. In that case, Google’s API is used to get the favicon of the imported URL.

When accessing external sites

TSM includes links to external sites. When accessing external sites, the privacy policy of each site is applied.

Download and use the extension with Firefox or Chrome

The TSM is hosted on and the Chrome Web Store. Please refer to the links below for information on which data is collected if you download the extension or during the regular updates.

Firefox Privacy Policy
Google Privacy Policy

4. Contact us

If you have questions about this Privacy Policy, please contact us at the address below:


5. Changes to Privacy Policy

We may update this Privacy Policy and when we do, we will also revise the “Effective Date” at the top of the Privacy Policy.