SECURITY REPORT · EXTENSHI SCAN
Custom Backgrounds
Firefox extension·by ALi
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
Custom Backgrounds's safety score vs every other extension we've scanned
Globally
24%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Privacy & Security
18%of privacy & security extensions carry more risk
Riskier ←→ Safer
Ranked against 11,537 privacy & security extensions
Findings
13
median 5Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
5
median 4Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 13 distinct issues across 6 severities
13
distinct issues
detected
detected
Critical18%
High00%
Needs Review00%
Medium1185%
Low18%
Info00%
Permissions requested
2 risky permissions of 5 total
1 critical permission require attention
This extension requests 5 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
Manage downloads
Can initiate downloads and access your download history
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Access current tab
Can temporarily access the content of the active tab when you click the extension
Medium
Unlimited local storage
Can store large amounts of data locally without size limits
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Scan performed by extenshi.io · Aug 16, 2026
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