SECURITY REPORT · EXTENSHI SCAN
Header Editor Pro – Modify HTTP Headers
Firefox extension·by Charly Brown
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 Editor Pro – Modify HTTP Headers's safety score vs every other extension we've scanned
Globally
81.17%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
71.17%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
5
median 38Lower is safer
Risky permissions
0
median 1Critical + high perms
Total permissions
3
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 5 distinct issues across 6 severities
5
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.
Critical120%
High00%
Needs Review00%
Medium360%
Low120%
Info00%
Permissions requested
3 permissions declared
No risky permissions
3 permissions requested — none are flagged as risky.
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
Manage tab groups
Can create and manage tab groups
Are you the author of Header Editor Pro – Modify HTTP Headers?
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 Editor Pro – Modify HTTP Headers's live security score on GitHub or in your docs
Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
Browser extensions made transparent.