SECURITY REPORT · EXTENSHI SCAN
CSS Filters Editor
Firefox extension·by Francesco De Stefano
0
/ 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 6 years
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
CSS Filters Editor's safety score vs every other extension we've scanned
Globally
27%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Web Development
15%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 14,329 web development extensions
Findings
11
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
9
median 3vs category median
Findings breakdown
Automated security signal · 11 distinct issues across 6 severities
11
distinct issues
detected
detected
Critical19%
High327%
Needs Review00%
Medium655%
Low19%
Info00%
Permissions requested
2 risky permissions of 3 total
1 critical permission require attention
This extension requests 3 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
View open tabs
Can see URLs and titles of all open tabs
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
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Scan performed by extenshi.io · Aug 3, 2026
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