SECURITY REPORT · EXTENSHI SCAN
Custom Elements DevTools
Firefox extension·by HubertKuch
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 Elements DevTools's safety score vs every other extension we've scanned
Globally
42%of extensions carry more risk
Riskier ←→ Safer
Ranked against 368,615 extensions
In Appearance
15%of appearance extensions carry more risk
Riskier ←→ Safer
Ranked against 17,698 appearance extensions
Findings
7
median 3Lower is safer
Critical findings
2
median 0Severity = Critical
Permissions
4
median 2Declared in manifest
Active users
1
median 3vs category median
Findings breakdown
Automated security signal · 7 distinct issues across 6 severities
7
distinct issues
detected
detected
Scanners reported 8 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical229%
High114%
Needs Review00%
Medium457%
Low00%
Info00%
Permissions requested
3 risky permissions of 4 total
3 high-risk permissions require attention
This extension requests 4 permissions in total. 3 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
High
View open tabs
Can see URLs and titles of all open tabs
High
Developer tools
Can extend browser developer tools with custom panels
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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