A utility that keeps a pinned tab in the last window to prevent the browser from closing accidentally.
Overview
Features & Capabilities
User Growth & Download Statistics
Manifest V3 Add-on
- By:
- SenSyuSya
- Daily users:
- 1 -1
- Version:
- 1.0.3 Last updated: 2026-06-26
- Version code:
- 6321428
- Creation date:
- 2026-06-23
- Risk:
- Very low risk impact High risk likelihood
- Size:
- 18.43KB
- Email:
- de*****@sensyusya.co.jp
- URLs:
- Website
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-07-26
- Compare stats and ranking:
- sssDntCls : keep last window vs Don't Close Last Tab
- sssDntCls : keep last window vs Don't Close Last Tab
- sssDntCls : keep last window vs TabReturn
For Developers
Contact the developer
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Is sssDntCls : keep last window 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.
sssDntCls : keep last window does not require any sensitive permissions.
Risk impact analysis details
- Low This permission has no access or impact on the user's system or data, thus carrying no risk.
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.
sssDntCls : keep last window 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 was recently updated in the past month. New updates may not be stable or safe.
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