extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Yomitan

Firefox extension·by Darius Jahandarie
57
/ 100 SAFETY SCORE
RISKY
Several elevated signals. Read the findings before sharing this with your team.

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

Yomitan's safety score vs every other extension we've scanned
Globally
56.59%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
46.59%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
64
median 38Lower is safer
Risky permissions
5
median 1Critical + high perms
Total permissions
11
median 4All declared perms
Critical findings
0
median 2Severity = Critical

Findings breakdown

Automated security signal · 64 distinct issues across 6 severities
64
distinct issues
detected
Scanners reported 68 raw occurrences; repeats of the same issue at the same location are merged here. The list below shows every occurrence.

Permissions requested

5 risky permissions of 11 total
1 critical permission require attention
This extension requests 11 permissions in total. 5 of them grant broad capabilities that are worth a careful look.
Critical
Communicate with desktop apps(optional)

Can exchange messages with applications installed on your computer

High
Execute scripts in pages

Can inject and execute JavaScript code in web pages

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
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

Medium
Write to clipboard

Can place content onto your clipboard

Medium
Unlimited local storage

Can store large amounts of data locally without size limits

Medium
Add context menu items

Can add custom items to the right-click context menu

Medium
Read clipboard

Can read text and data currently on your clipboard

Low
Block network requests (declarative)

Can block or redirect network requests using predefined rules without seeing content

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Scan performed by extenshi.io · Jul 25, 2026· partial run (some scanners failed)
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