SECURITY REPORT · EXTENSHI SCAN
Mail Checker for Proton Mail
Firefox extension·by beo
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
Mail Checker for Proton Mail's safety score vs every other extension we've scanned
Globally
10%of extensions carry more risk
Riskier ←→ Safer
Ranked against 369,936 extensions
In Social & Communication
4%of social & communication extensions carry more risk
Riskier ←→ Safer
Ranked against 12,741 social & communication extensions
Findings
268
median 4Lower is safer
Critical findings
0
median 0Severity = Critical
Permissions
6
median 3Declared in manifest
Active users
8
median 3vs category median
Findings breakdown
Automated security signal · 268 distinct issues across 6 severities
268
distinct issues
detected
detected
Scanners reported 270 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical00%
High31%
Needs Review00%
Medium26398%
Low21%
Info00%
Permissions requested
1 risky permission of 6 total
1 high-risk permission require attention
This extension requests 6 permissions in total. 1 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
Medium
Show notifications
Can display desktop notifications outside the browser
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Block requests with host access
Can block or redirect network requests and requires host permissions
Low
Schedule tasks
Can schedule periodic background tasks
Info
*://*.proton.me/*
No additional information available.
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Scan performed by extenshi.io · Aug 17, 2026
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