SECURITY REPORT · EXTENSHI SCAN
Block Sender for Gmail
Firefox extension·by Block Sender
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
Block Sender for Gmail's safety score vs every other extension we've scanned
Globally
23.22%of extensions carry more risk
Riskier ←→ Safer
Ranked across every extension we scan
In its category
13.219999999999999%of its category extensions carry more risk
Riskier ←→ Safer
Ranked within its category
Findings
68
median 38Lower is safer
Risky permissions
3
median 1Critical + high perms
Total permissions
8
median 4All declared perms
Critical findings
1
median 2Severity = Critical
Findings breakdown
Automated security signal · 68 distinct issues across 6 severities
68
distinct issues
detected
detected
Scanners reported 85 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.
Critical11%
High69%
Needs Review00%
Medium5987%
Low23%
Info00%
Permissions requested
3 risky permissions of 8 total
3 high-risk permissions require attention
This extension requests 8 permissions in total. 3 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
Observe web requests
Can monitor all network requests made by the browser
High
Block and modify web requests
Can intercept, block, or modify any network request before it completes
Medium
Store local data
Can save data locally in the browser for persistence
Medium
Show notifications
Can display desktop notifications outside the browser
Low
Schedule tasks
Can schedule periodic background tasks
Info
https://mail.google.com/*
No additional information available.
Info
*://*.blocksender.io/*
No additional information available.
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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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