Download Virus Checker+

Automatically check all the downloads files against well-known anti-viruses using VirusTotal API.

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This is the upgrade version of Download Virus Checker by James Fray: https://addons.mozilla.org/en-US/firefox/addon/download-virus-checker/

Features:

Use custom API key. I highly recommend you to use your personal VirusTotal API key because the default key is limited to 4 requests per minute.
Scan mode: File (limit file size is 32Mb) or URL.

VirusTotal API document: https://developers.virustotal.com/v2.0/reference#public-vs-private-api

Add-on

By:

Daily users:

15 3

Rating:

1.00

(1)

Version:

0.0.10 Last updated: 2019-04-18

Version code:

3202775

Creation date:

2019-04-07

Risk:

Permissions:

storage
tabs
downloads
notifications
https://www.virustotal.com/*
<all_urls>

Size:

74.89KB

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-18

Ranking

# 23,212 ▲ 2,333

Other rankings

#127 in checker keyword 59 ▲ 8 #171 in spell checker keyword 47 ▲ 11 #249 in upgrade keyword 3 ▲

User reviews

by 远离*****, 2025-04-11

by 退出*****, 2025-03-19

It has stopped working, I could check it, thanks

by Fi*****, 2020-06-09

View all user reviews ›

Extension safety

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Download Virus Checker+ requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********
Medium ******* ******* ************* ***** *** ** ******* *** **** ******* ****** ******** *******
Low ******* ****** ** *** ********* ******** ********************

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Download Virus Checker+ is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** *** **** *******
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****

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