SECURITY REPORT · EXTENSHI SCAN
Svelte Devtools
Firefox extension·by RedHatter271
0
/ 100 SAFETY SCORE
DANGEROUS
Meaningful risk surface. Avoid on managed devices without review.
Likely abandonedsafety score reduced by 30 points
- No update in over 5 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
Svelte Devtools's safety score vs every other extension we've scanned
Globally
12%of extensions carry more risk
Riskier ←→ Safer
Ranked against 357,609 extensions
In Web Development
5%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 12,864 web development extensions
Findings
20
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
3
median 3Declared in manifest
Active users
1216
median 3vs category median
Findings breakdown
Automated security signal · 20 distinct issues across 6 severities
20
distinct issues
detected
detected
Critical15%
High735%
Needs Review00%
Medium840%
Low15%
Info315%
Permissions requested
3 risky permissions of 3 total
1 critical permission require attention
This extension requests 3 permissions in total. 3 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
High
Developer tools
Can extend browser developer tools with custom panels
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Scan performed by extenshi.io · Aug 24, 2026
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