SECURITY REPORT · EXTENSHI SCAN

Multithreaded Download Manager

Firefox extension·by jingyu9575
73
/ 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

Multithreaded Download Manager's safety score vs every other extension we've scanned
Globally
19%of extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 401,999 extensions
In Other
6%of other extensions carry more risk
This extension
Riskier ←→ Safer
Ranked against 28,708 other extensions
Findings
46
median 3Lower is safer
Critical findings
1
median 0Severity = Critical
Permissions
13
median 3Declared in manifest
Active users
6138
median 2vs category median

Findings breakdown

Automated security signal · 46 distinct issues across 6 severities
46
distinct issues
detected

Permissions requested

5 risky permissions of 13 total
1 critical permission require attention
This extension requests 13 permissions in total. 5 of them grant broad capabilities that are worth a careful look.
Critical
Access to all websites

Can read and modify content on every website you visit

High
Manage downloads

Can initiate downloads and access your download history

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
View open tabs

Can see URLs and titles of all open tabs

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
Open downloaded files

Can open files that have been downloaded

Medium
Read clipboard

Can read text and data currently on your clipboard

Medium
Write to clipboard

Can place content onto your clipboard

Medium
Custom menus

Can add custom items to the browser context menu

Medium
Override context menu

Can override the default context menu behavior

Medium
Show notifications

Can display desktop notifications outside the browser

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Scan performed by extenshi.io · Aug 18, 2026
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