Is UltraWide for YouTube: custom fullscreen ratios [QVI] safe?

Low risk

UltraWide for YouTube polls MetricMuse for commands that collect Google, YouTube, and UNext profile data and viewing history.

The extension runs a background YouTube task every hour and can receive MetricMuse commands to read Google account details, YouTube/My Activity history, and related profile identifiers before uploading the results. On UNext pages it also polls MetricMuse for commands that read account/profile details and viewing history, and on several streaming sites it posts account or profile identifiers from cookies or local storage by default unless sharing is disabled.

Part of this rating comes from analysis signals we haven't published as detailed findings yet.

TheBestChromeExtensionsv1.0.8Chrome Web Store
17Risk
Who publishes it

HideApp LLC - 70 other listings from the same operator, 16 of them carrying a finding

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

Publisher
TheBestChromeExtensions
Declared legal entity
HideApp LLC
Registered address
1021 East Lincolnway, Cheyenne, WY 82001, US
Registered contact
HideApp LLC
Website
support.hideapp.info/support/tickets/new

Same store account

15 other listings published from this account, 271k+ users between them. 3 of them carry a finding.

Hulu Ad Skipper100k+MediumDisney Plus Picture in Picture80k+LowHBO Max HQ: change video quality [QVI]20k+MediumHulu Picture In Picture [QVI]20k+LowHBOmax Skipper: skip ads and intros20k+MediumHBO Max Picture in Picture [QVI]10k+Low9 more listings in the relationship graph, on paid plans →

Same operator - 55 listings

Published under a different store account, but sharing the registered address, contact or declared legal entity this one gave the store.

Shorts scroller, works with Youtube [QVI]
same registered contact
30k+Medium
Ad Skipper for Prime Video
same registered address
90k+Medium
Apple TV Speeder: adjust playback speed [QVI]
same registered address
2k+Low
Pluto TV Picture in Picture [QVI]
same registered address
2k+Low
Ad Skipper for Pluto TV [QVI]
same registered contact
8k+Low
Apple TV+ SubStyler: Customize Subtitles & Captions [QVI]
same registered address
1k+Low49 more listings in the relationship graph, on paid plans →

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.

cc.unext.jp
Also called by 5 other listings, including YouTube Speeder: adjust playback speed [QVI], hulujp-%E3%81%AE%E3%83%94%E3%82%AF%E3%83%81%E3%83%A3%E3%83%BC%E3%83%BB%E3%82%A4%E3%83%B3%E3%83%BB%E3%83%94%E3%82%AF%E3%83%81%E3%83%A3%E3%83%BC, NCOverlay

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 1.0.8. 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 every secure site you visit

    https://*/*

  • Schedule its own background tasks

    alarms

  • Store data in your browser

    storage

Where it sends data

Destinations our analysis observed UltraWide for YouTube: custom fullscreen ratios [QVI] 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.

  • metricmuse.xyz

    UltraWide for YouTube: custom fullscreen ratios [QVI] sends data to metricmuse.xyz. 10 other extensions we have analysed send data here.

Updated 30 September 2026lfphiacjligbdklkafccneapdpbkohne