Tab Session Manager
By: sienori
Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.
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Features & Capabilities
User Growth & Download Statistics
- By:
- sienori
- Daily users:
- 152,559 -66
- Rating:
- 4.16 (1,222)
- Version:
- 7.3.0 Last updated: 2026-03-06
- Version code:
- 6158843
- Creation date:
- 2017-10-02
- Risk:
- Moderate risk impact Very low risk likelihood
- Permissions:
- Size:
- 750.41KB
- Email:
- si*****@gmail.com
- URLs:
- Website ,Privacy policy
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-06-23
- Compare stats and ranking:
- Tab Session Manager vs Session Tab Manager
- Tab Session Manager vs Tab Session Manager
- Tab Session Manager vs Browser Session Manager
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Permission Change History
2026-01-11: Version 7.1.1 → 7.2.0
Add Permissions: tabGroups
2024-06-03: Version 6.12.2 → 7.0.0
Add Permissions: alarms
User Reviews
Users praise the add-on for saving/restoring very large tab sessions and preventing loss after crashes, plus good customization and a manual export option. However, reliability issues recur: sessions can be deleted by bugs, auto-save can fail, and backups may be outdated. It also fails to preserve tab groups/Tree Style Tab state and per-tab history. Open/restore can be flaky, and delete actions lack confirmation, sometimes causing duplicates and memory bloat. Overall, strong concept, with fragile execution. Pros
- Saves and restores large tab sessions and thousands of tabs after crashes or closures.
- Keeps sessions across multiple windows and helps prevent lost work.
- Highly customizable and flexible workflow.
- Supports manual export of saved sessions.
- Has saved users from major losses by restoring many tabs quickly.
Cons
- Bugs can delete all sessions and auto-save can fail, leading to data loss or stale backups.
- Does not preserve tab groups or Tree Style Tab state, nor per-tab browsing history on restore.
- Open/restore actions can misfire (Open button may not work, startup window shifts) and can create duplicate windows, increasing memory usage.
- Delete button is too close to Open and often lacks a confirmation, risking accidental deletions.
- Behavior varies across Firefox updates and some users report memory bloat from duplicated tabs.
Recent reviews
by Fi*****, 2026-06-12
by Er*****, 2026-06-11
One of the best extensions I've installed. Simple, effective, and doesn't bloat the browser at all.
by Ka*****, 2026-05-17
Is Tab Session Manager 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.
Tab Session Manager requires a few sensitive permissions. 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.
- 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.
Tab Session Manager has earned a good reputation and can be trusted.
Risk likelihood analysis details
- Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** **** **** ****** ******* ********** **** ****** ** ** ****** *** *****
- Good **** ********* ** ****** ** ********
- Good **** ********* *** **** **** *******
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