Is BOJ Extended safe?

Clean risk

BOJ Extended sends source code and sample input from its submit-page test feature to tio.run for remote execution.

When you click the Test (beta) button on an acmicpc.net submit page, BOJ Extended reads the code editor contents and selected language. It packages the code with sample input and posts it to tio.run so the code can be executed remotely.

L4zyF0xv1.10.0Chrome Web Store
0Risk
Who publishes it

Personal - no other listings under this identity, 1 shared hostname

What this publisher told the store about itself, and the other listings that told it the same thing.

Publisher
L4zyF0x
Declared legal entity
Personal
Registered address
Jeonju-si, Jeollabuk-do, Rep. of KOREA, 54899, 30-8, Samsong 3-gil, Deokjin-gu, Ankeny, IA 50023, US
Registered contact
JY

Shared hosts - 1 hostname

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

help.acmicpc.net
Also called by 5 other listings, including 백준허브(BaekjoonHub)

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

What it can do

Permissions this extension asks for, as declared in version 1.10.0. Asking for a permission is not a finding on its own - it is what the extension can do if it chooses to.

  • Read and change your data on www.acmicpc.net

    https://www.acmicpc.net/? and 1 more

  • Read and change your data on solved.ac

    https://solved.ac/api/v3/*

  • Store data in your browser

    storage

  • Store an unlimited amount of data in your browser

    unlimitedStorage

  • Block and redirect the requests your browser makes

    declarativeNetRequest

declarativeNetRequestWithHostAccess

Where it sends data

Destinations our analysis observed BOJ Extended contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • tio.run

    BOJ Extended sends data to tio.run. No other extension we have analysed sends data here.

Updated 30 September 2026mfcaadoifdifdnigjmfbekjbhehibfel