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SECURITY REPORT · EXTENSHI SCAN

Flash Player 2021

Firefox extension·by 17029170
33
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.

Likely abandonedsafety score reduced by 30 points

  • No update in over 5 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

Flash Player 2021's safety score vs every other extension we've scanned
Globally
7%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 402,581 extensions
In Social & Communication
3%of social & communication extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 13,639 social & communication extensions
Findings
30
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
232
median 3vs category median

Findings breakdown

Automated security signal · 30 distinct issues across 6 severities
30
distinct issues
detected
Scanners reported 36 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

3 risky permissions of 4 total
1 critical permission require attention
This extension requests 4 permissions in total. 3 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
Access all HTTPS sites

Can read and modify content on all encrypted websites

High
Access all HTTP sites

Can read and modify content on all non-encrypted websites

Info
https://modernkit.one/*

No additional information available.

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Scan performed by extenshi.io · Aug 7, 2026
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