[Extension Issue] AdGuard doesn't work at all

[kispintyi]

Extension name

AdGuard

Chrome Web Store URL

https://chromewebstore.google.com/detail/adguard-adblocker/bgnkhhnnamicmpeenaelnjfhikgbkllg

Extension version, can be found in the extension's details page (if known)

5.3.0.22

Problem type

• Won't install / download fails
• Installs but doesn't run
• Action button missing or not clickable
• Options page doesn't open or is broken
• Background service worker errors
• Feature(s) not working as expected
• Crashes / errors shown in console
• Other

Describe the issue

It doesn't run at all and due to this I can't block YouTube ads when viewing community made content for example.

Confirmation

• I tested with the latest Extendium version
• The extension works in Google Chrome (or another Chromium browser)

Extendium Plugin Version

1.1.1

Millennium Version

v2.35.0

Operating System

Windows

Steps To Reproduce

1. Install the extension
2. See error in "Manage Extensions" and clicking the "Details" button for AdGuard

Logs / Console output

[Extension][popup]: 2026-03-09T22:23:30:921: [ext.MessengerCommon]: received message in MessengerCommon.createLongLivedConnection has no type field: undefined
[Extension][popup]: 2026-03-09T22:23:30:921: [ext.MessengerCommon]: received message in MessengerCommon.createLongLivedConnection has no type field: undefined
[Extension][popup]: 2026-03-09T22:24:16:708: [ext.Options-mv3]: Failed to get options data
[Extension][popup]: 2026-03-09T22:24:16:708: [ext.Options-mv3]: Failed to get options data

Other installed extensions (optional)

SteamDB

Troubleshooting tried

• Restarted Steam
• Reinstalled this extension from the Chrome Web Store URL
• Switched to Default skin/theme
• Removed other extensions to rule out conflicts

[madmaxgrey]

currently adblocks doesn't work with extendium, but hopfully in the next big update it will but no promises

[TipsyTheCat]

currently adblocks doesn't work with extendium, but hopfully in the next big update it will but no promises

why wouldn't they? i use ublock without the need of this mod/plugin (or any modded client) and it works just fine. i don't see how a client mod that just makes installing extensions a little easier would break that