extenshi.io
SECURITY REPORT · EXTENSHI SCAN

Markdown Viewer

Firefox extension·by xicilion
56
/ 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

Markdown Viewer's safety score vs every other extension we've scanned
Globally
56.1%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked across every extension we scan
In its category
46.1%of its category extensions carry more risk
This extension
Riskier ←→ Safer
Ranked within its category
Findings
56
median 38Lower is safer
Risky permissions
5
median 1Critical + high perms
Total permissions
11
median 4All declared perms
Critical findings
2
median 2Severity = Critical

Findings breakdown

Automated security signal · 56 distinct issues across 6 severities
56
distinct issues
detected
Scanners reported 63 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
5 high-risk permissions require attention
This extension requests 11 permissions in total. 5 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
Execute scripts in pages

Can inject and execute JavaScript code in web pages

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

High
Manage downloads(optional)

Can initiate downloads and access your download history

Medium
Store local data

Can save data locally in the browser for persistence

Medium
Unlimited local storage

Can store large amounts of data locally without size limits

Medium
Access current tab

Can temporarily access the content of the active tab when you click the extension

Medium
Custom menus

Can add custom items to the browser context menu

Info
file:///*

No additional information available.

Info
*://*/*

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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