SECURITY REPORT · EXTENSHI SCAN
Notion Customizer
Firefox extension·by Grayson Taylor
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
Notion Customizer's safety score vs every other extension we've scanned
Globally
40%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Appearance
13%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 17,915 appearance extensions
Findings
9
median 3Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
6
median 2Declared in manifest
Active users
0
median 3vs category median
Findings breakdown
Automated security signal · 9 distinct issues across 6 severities
9
distinct issues
detected
detected
Critical111%
High00%
Needs Review00%
Medium333%
Low556%
Info00%
Permissions requested
1 risky permission of 6 total
1 high-risk permission require attention
This extension requests 6 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Medium
Store local data
Can save data locally in the browser for persistence
Info
https://*.notion.so/*
No additional information available.
Info
https://*.notion.com/*
No additional information available.
Info
https://app.notion.com/*
No additional information available.
Info
https://calendar.notion.so/*
No additional information available.
Are you the author of Notion Customizer?
Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.
Add the badge to your README
Show Notion Customizer's live security score on GitHub or in your docs
Scan performed by extenshi.io · Aug 20, 2026
Browser extensions made transparent.