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SECURITY REPORT · EXTENSHI SCAN

FireLens

Firefox extension·by Francesco De Stefano
36
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.

Likely abandonedsafety score reduced by 30 points

  • No update in over 7 years
Why this matters

An unmaintained extension keeps whatever flaws it shipped with, and a listing with users but no owner is an attractive target to buy and repurpose.

Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue

How it ranks

FireLens's safety score vs every other extension we've scanned
Globally
10%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,581 extensions
In Web Development
5%of web development extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 15,264 web development extensions
Findings
28
median 4Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
7
median 2vs category median

Findings breakdown

Automated security signal · 28 distinct issues across 6 severities
28
distinct issues
detected

Permissions requested

2 risky permissions of 3 total
1 critical permission require attention
This extension requests 3 permissions in total. 2 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites

Can read and modify content on every website you visit

High
View open tabs

Can see URLs and titles of all open tabs

Medium
Access current tab

Can temporarily access the content of the active tab when you click the extension

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Scan performed by extenshi.io · Aug 7, 2026
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