SECURITY REPORT · EXTENSHI SCAN
ECSY Developer tools
Firefox extension·by Mozilla Mixed Reality
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
- The developer's website is no longer reachable
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
ECSY Developer tools's safety score vs every other extension we've scanned
Globally
5%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Web Development
2%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 14,329 web development extensions
Findings
41
median 4Lower is safer
Critical findings
9
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
5
median 3vs category median
Findings breakdown
Automated security signal · 41 distinct issues across 6 severities
41
distinct issues
detected
detected
Scanners reported 47 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical922%
High1127%
Needs Review00%
Medium1434%
Low512%
Info25%
Permissions requested
5 risky permissions of 6 total
5 high-risk permissions require attention
This extension requests 6 permissions in total. 5 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
High
Access all HTTP sites
Can read and modify content on all non-encrypted websites
High
Access all HTTPS sites
Can read and modify content on all encrypted websites
High
Developer tools
Can extend browser developer tools with custom panels
High
Access local files
Can read files on your local filesystem opened in the browser
Medium
Store local data
Can save data locally in the browser for persistence
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Scan performed by extenshi.io · Aug 5, 2026
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