Usersno change0%
3
3
Ratingno change0%
—
— reviews
Reviewsno change0%
—
Version
0.9.0
Manifest V2
History
1 snapshotsTracking since Apr 26, 2026.
View as table
| Date | Users | Rating | Reviews | Version |
|---|---|---|---|---|
| Apr 26, 2026 | 3 | — | — | 0.9.0 |
| Now | 3 | — | — | 0.9.0 |
Permissions & access
- Permissions
- storage
- Host access
- None declared
Screenshots
About
Simple Concentration. シンプルな神経衰弱だよー！
Technical
- Version
- 0.9.0
- Manifest
- V2
- Size
- 9.67MiB
- Min Chrome
- 23
- Languages
- 1
- Featured
- No
Metadata
- ID
- fopfhcjpfmmaldiofiokjcjpcapngcog
- Developer ID
- uf0a1e81c8e9a873d31528a4d06a40ad7
- Developer Email
- —
- Created
- Jan 9, 2015
- Last Updated (Store)
- Feb 11, 2015
- Last Scraped
- May 23, 2026
- Support URL
- —
- Privacy Policy
- —
Similar extensions
Alternatives to mf Concent!, ranked by description similarity.
Pink Focus
Pink noise generator for focus with 30-minute timer.
7
Concentration
Concentration , also known as Memory, is the classic card game that can be enjoyed by all ages.
234
★ 3.7
Qcurve - Memory Link
調べた言葉を忘却曲線に基づき記憶に定着させます。
—
pomo45
ポモドーロタイマー広告なし、完全無料。45分作業→10分休憩を3回繰り返し
5
★ 5.0
赤シート for Web
Webページ上のテキストを隠して暗記練習できる赤シート風ツール
45
シンプル・サイコロ
シンプルなサイコロを振る
9
Concentration
An ChatGPT-powered extension designed to improve your concentration level
236
★ 4.6
Mindful Shorts
YouTube Shortsの無意識な視聴を抑制し、マインドフルな時間を。
—
Data sourced from the Chrome Web Store · last verified May 23, 2026.