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SECURITY REPORT · EXTENSHI SCAN

JWT Debugger

Firefox extension·by JWT.io
30
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.

Likely abandonedsafety score reduced by 30 points

  • No update in over 6 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

JWT Debugger's safety score vs every other extension we've scanned
Globally
5%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 409,539 extensions
In Other
2%of other extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 28,735 other extensions
Findings
42
median 3Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
7
median 3Declared in manifest
Active users
987
median 2vs category median

Findings breakdown

Automated security signal · 42 distinct issues across 6 severities
42
distinct issues
detected
Scanners reported 57 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

2 risky permissions of 7 total
1 critical permission require attention
This extension requests 7 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
Access browser cookies

Can read and modify cookies, potentially accessing login sessions

Medium
Access current tab

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

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Read clipboard

Can read text and data currently on your clipboard

Medium
Write to clipboard

Can place content onto your clipboard

Info
https://jwt.io/*

No additional information available.

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Scan performed by extenshi.io · Aug 14, 2026
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