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SECURITY REPORT · EXTENSHI SCAN

Simple URL Mapping

Firefox extension·by terrywh
34
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.

Abandonedsafety score reduced by 40 points

  • No update in over 7 years
  • The developer's website is no longer reachable
  • 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

Simple URL Mapping's safety score vs every other extension we've scanned
Globally
21%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 397,225 extensions
In Web Development
11%of web development extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 15,237 web development extensions
Findings
20
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
0
median 2vs category median

Findings breakdown

Automated security signal · 20 distinct issues across 6 severities
20
distinct issues
detected

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
Observe web requests

Can monitor all network requests made by the browser

High
Block and modify web requests

Can intercept, block, or modify any network request before it completes

Medium
Store local data

Can save data locally in the browser for persistence

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Scan performed by extenshi.io · Aug 24, 2026
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