SECURITY REPORT · EXTENSHI SCAN
Header Ext
Firefox extension·by Braden
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
Header Ext's safety score vs every other extension we've scanned
Globally
23%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Web Development
12%of web development extensions carry more risk
Riskier ←→ Safer
Ranked against 14,329 web development extensions
Findings
14
median 4Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
4
median 3Declared in manifest
Active users
3
median 3vs category median
Findings breakdown
Automated security signal · 14 distinct issues across 6 severities
14
distinct issues
detected
detected
Scanners reported 16 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical17%
High321%
Needs Review00%
Medium857%
Low214%
Info00%
Permissions requested
1 risky permission of 4 total
1 high-risk permission require attention
This extension requests 4 permissions in total. 1 of them grant broad capabilities that are worth a careful look.
High
View open tabs
Can see URLs and titles of all open tabs
Medium
Store local data
Can save data locally in the browser for persistence
Low
Block network requests (declarative)
Can block or redirect network requests using predefined rules without seeing content
Low
View blocked request stats
Can see which declarative rules matched network requests
Are you the author of Header Ext?
Claim this extension to respond to findings, add context, and earn a verified badge on extenshi.io.
Add the badge to your README
Show Header Ext's live security score on GitHub or in your docs
Scan performed by extenshi.io · Aug 10, 2026
Browser extensions made transparent.