Is Duplicate Tabs Closer Safe? — Extension Safety Profile
Quick verdict: Duplicate Tabs Closer earns a safety grade A, 80.8 out of 100, based on 5 of 5 dimensions.
80.8/100
Grade A · 5 of 5 checks
What we found
Automated safety profile from public signals (the extension's manifest & permissions, store listing, publisher, privacy policy). A full review hasn't been published yet.
What this safety grade means
Duplicate Tabs Closer earns a safety grade of A (80.8/100), measured across 5 of 5 dimensions. Its strongest area is Maintenance & Ownership (100%). The weakest is Publisher & Identity (60%) — what holds its grade back the most.
On the public records we can check, Duplicate Tabs Closer comes through cleanly. 10,000 active users/installs reported on the store. Store rating 4.3/5 from 108 user ratings. Last updated on the store 2026-07-12. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open Duplicate Tabs Closer's own store listing and privacy policy before installing, and weigh it against the other browser extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 4.8/8 pts 2 of 5 checks verified | Automated signals | |
| Permissions & Access | 83% · 20.8/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 83% · 13.2/16 pts 4 of 5 checks verified | Automated signals | |
| Maintenance & Ownership | 100% · 7.5/7.5 pts 1 of 2 checks verified | Automated signals | |
| Community Reputation | 74% · 7.4/10 pts 2 of 4 checks verified | Automated signals |
In-depth safety analysis
The extension requests the tabs, webNavigation, and storage permissions. These allow it to see the URLs and titles of all open tabs, observe when pages start loading or complete, and save settings locally. For a tool designed to identify and close duplicate tabs, this scope is normal—it needs to compare tab information by URL to function. It does not ask for host permissions like <all_urls>, so it cannot read the content inside pages.
Tab managers generally can view your browsing activity across every open tab, which means they handle sensitive information. A careful user should consider the publisher’s trustworthiness and review the permissions. The developer declares that data is not sold or used for unrelated purposes, but such self-reported claims are not independently verified. For any extension in this category, it is wise to verify that the functionality truly justifies the requested tab access and to stay alert for unexpected behaviour after updates.
The fact sheet shows a Maintenance & Ownership score of 100%, indicating the extension is actively maintained and recently updated, which lowers the risk of unpatched vulnerabilities. The weakest point is Publisher & Identity at 60%, suggesting limited public information about the developer. This creates a profile of a well-cared-for tool from a less-established source, making standard caution with tab-access permissions appropriate.
AI-assisted analysis of the documented signals above (permissions, store data, privacy practices) — explains what they mean and the risks typical for this category. Not a hands-on test.
What the store listing shows
Who's Behind Duplicate Tabs Closer?
- Publisher Peuj
Public records identify the publisher, but no individual founders or a separate registered company are named — which is what holds the Publisher & Identity score back. Less public information about who operates an extension means less you can verify about their long-term accountability.
How it compares
Among the 838 browser extensions we track, Duplicate Tabs Closer scores higher on safety than 66% of them.
Computed from our own database of assessed browser extensions — updated as we track more.
Evidence on File (12)
Duplicate Tabs Closer FAQ
- Is Duplicate Tabs Closer safe?
- Duplicate Tabs Closer earns a safety grade of A (80.8/100) on our evidence-based assessment, based on 5 of 5 safety dimensions we could verify from public records. This is an automated profile built from public records, not a hands-on review.
- Who is behind Duplicate Tabs Closer?
- Duplicate Tabs Closer is operated by Peuj.
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