SECURITY REPORT · EXTENSHI SCAN

Awesome NicoNico Downloader

Firefox extension·by pbion.com

/ 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
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

Awesome NicoNico Downloader's safety score vs every other extension we've scanned

Globally

13%of extensions carry more risk

This extension

Riskier ←→ Safer

Ranked against 369,936 extensions

In Photos Music Videos

4%of photos music videos extensions carry more risk

This extension

Riskier ←→ Safer

Ranked against 10,146 photos music videos extensions

Findings

median 4Lower is safer

Critical findings

median 0Severity = Critical

Permissions

median 3Declared in manifest

Active users

304

median 6vs category median

Findings breakdown

Automated security signal · 59 distinct issues across 6 severities

distinct issues
detected

Scanners reported 65 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Critical12%

High1424%

Needs Review00%

Medium3763%

Low610%

Info12%

Permissions requested

2 risky permissions of 20 total

2 high-risk permissions require attention

This extension requests 20 permissions in total. 2 of them grant broad capabilities that are worth a careful look.

High

Observe web requests

Can monitor all network requests made by the browser

High