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Features & Capabilities
User Growth & Download Statistics
- By:
- Midra
- Daily users:
- 193 5
- Rating:
- 4.20 (5)
- Version:
- 3.39.1 Last updated: 2026-07-02
- Version code:
- 6334151
- Creation date:
- 2023-11-02
- Risk:
- Very high risk impact Moderate risk likelihood
- Permissions:
- Host permissions:
- <all_urls>
- <all_urls>
- Content scripts matches:
- <all_urls>
- www.amazon.co.jp
- video.unext.jp
- abema.tv
- www.b-ch.com
- animestore.docomo.ne.jp
- tver.jp
- www.disneyplus.com
- tv.dmm.com
- fod.fujitv.co.jp See more
- <all_urls>
- Size:
- 1.69MB
- Email:
- *****@midra.me
- URLs:
- Website
- Full description:
- See detailed description
- Source:
- Firefox Add-ons Store
- Data ingested on:
- 2026-07-12
- Compare stats and ranking:
-
Ranking
Other platforms
For Developers
Contact the developer
Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Permission Change History
2024-10-29: Version 3.21.0 → 3.22.0
Add Permissions: clipboardRead downloads
2024-09-01: Version 3.10.12 → 3.11.0
Remove Host permissions: https://abema.tv/* https://www.b-ch.com/titles/* https://animestore.docomo.ne.jp/animestore/* https://tv.dmm.com/* https://fod.fujitv.co.jp/* https://www.hulu.jp/* https://www.amazon.co.jp/* https://tver.jp/* https://video.unext.jp/*
2024-08-31: Version 3.10.10 → 3.10.12
Add Host permissions: https://abema.tv/* https://www.b-ch.com/titles/* https://animestore.docomo.ne.jp/animestore/* https://tv.dmm.com/* https://fod.fujitv.co.jp/* https://www.hulu.jp/* https://www.amazon.co.jp/* https://tver.jp/* https://video.unext.jp/*
2024-07-25: Version 3.4.1 → 3.5.0
Add Permissions: contextMenus
2024-07-23: Version 3.3.2 → 3.4.1
Add Host permissions: <all_urls>
Add Permissions: clipboardWrite
2024-06-26: Version 2.6.3 → 3.1.0
Remove Host permissions: https://*.nicovideo.jp/* https://animestore.docomo.ne.jp/* https://www.amazon.co.jp/* https://abema.tv/* https://www.disneyplus.com/* https://tver.jp/* https://www.b-ch.com/* https://video.unext.jp/* https://tv.dmm.com/* https://www.hulu.jp/* https://lemino.docomo.ne.jp/* <all_urls>
Add Permissions: unlimitedStorage
Remove Permissions: scripting contextMenus
2023-12-01: Version 2.4.2 → 2.4.7
Add Host permissions: <all_urls>
2023-11-09: Version 2.1.0 → 2.2.0
Add Host permissions: https://www.hulu.jp/* https://lemino.docomo.ne.jp/*
User Reviews
by *****, 2026-03-20
特許権侵害の可能性。
作者がニコニコ・ドワンゴに特許使用料を支払って、使用許可を得ている場合は問題ありません。
ニコニコのコメント資産を０円で利用し、コメントサーバに負荷をかける行為。これは善でしょうか。
ＦＣ２裁判の前例があります。
ニコニコの社長は「つぶす」と公言されています。
詳しくは法務部へ聞いてみられてください。
by IW*****, 2025-11-09
Is NCOverlay Safe?
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.
NCOverlay requires a lot of sensitive permissions. 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 ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
- Critical ******* ****** ** *** ********* ******** ****** ********* ********* ********* ****** ******** *************** ******** ******** ************ **************** ******** ************
- High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
- High ****** ******* *** ********* ********* ******** ***** *** ** ********** ****** * ******** ******* *****
- Medium ****** ********** ** ******** ********** *** ********* ******* ******** ****** ******** ****** ********
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 Add-ons Store, 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.
NCOverlay is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.
Risk likelihood analysis details
- High This extension was recently updated in the past month. New updates may not be stable or safe.
- High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
- Good **** ********* *** **** **** *******
Extension Guard
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Secure Your Browser Upgrade to see full risk analysis details
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