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SECURITY REPORT · EXTENSHI SCAN

Librus Average

Firefox extension·by Krzysztof Zdulski
48
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

Likely abandonedsafety score reduced by 30 points

  • No update in over 7 years
  • Bundles libraries with known vulnerabilities and no fix in sight
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

Librus Average's safety score vs every other extension we've scanned
Globally
34%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Appearance
10%of appearance extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 18,944 appearance extensions
Findings
15
median 3Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
4
median 2Declared in manifest
Active users
626
median 3vs category median

Findings breakdown

Automated security signal · 15 distinct issues across 6 severities
15
distinct issues
detected
Scanners reported 22 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

4 permissions declared
No risky permissions
4 permissions requested — none are flagged as risky.
Medium
Store local data

Can save data locally in the browser for persistence

Info
https://synergia.librus.pl/

No additional information available.

Info
https://fonts.googleapis.com/

No additional information available.

Info
https://synergia.librus.pl/przegladaj_oceny/uczen

No additional information available.

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Scan performed by extenshi.io · Aug 16, 2026
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