SECURITY REPORT · EXTENSHI SCAN
FIR Convolver + A/V Sync
Firefox extension·by Omri V
0
/ 100 SAFETY SCORE
CAUTION
Mostly fine, but a few things worth reviewing before you install.
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
FIR Convolver + A/V Sync's safety score vs every other extension we've scanned
Globally
9%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Photos Music Videos
3%of photos music videos extensions carry more risk
Riskier ←→ Safer
Ranked against 10,146 photos music videos extensions
Findings
35
median 4Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
1
median 6vs category median
Findings breakdown
Automated security signal · 35 distinct issues across 6 severities
35
distinct issues
detected
detected
Critical26%
High26%
Needs Review00%
Medium3086%
Low13%
Info00%
Permissions requested
3 risky permissions of 6 total
2 critical permissions require attention
This extension requests 6 permissions in total. 3 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps
Can exchange messages with applications installed on your computer
Critical
Access to all websites
Can read and modify content on every website you visit
High
Manage downloads
Can initiate downloads and access your download history
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Unlimited local storage
Can store large amounts of data locally without size limits
Medium
Write to clipboard
Can place content onto your clipboard
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Scan performed by extenshi.io · Aug 9, 2026
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