Atcoder Companion icon

Atcoder Companion

by conlacda · Tools
Manifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Enhance your experience by providing some useful features designed to streamline your workflow and boost your productivity.

Users
2,000
0 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
10
0 in 30 days
Store rank
#21K
#17K among extensions
Version
0.3.8
updated 7 Sep 2026

Users

monthly, 2 years
11,0002,000May 2024Aug 2025Oct 2026
Latest, 15 Oct 2026: 2,000 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
0510May 2024Aug 2025Oct 2026
Latest, 15 Oct 2026: 10 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Atcoder Companion

This extension offers some key features: 1. Estimate performance and rating during contests. 2. Add test cases to a problem statement (disabled by default, open the setting popup to enable). 3. Show the status of the problems you have submitted. 4. Allow copying and downloading test cases (each or all) with one click. 5. Simplify debugging with the custom test page. Blog on Codeforces: https://codeforces.com/blog/entry/133287 Feel free to open an issue or submit a pull request on GitHub: https://github.com/conlacda/atcoder-companion ============================ 下記の機能を提供しています: 1. コンテスト開催中のパフォーマンス値やレーティングの表示(実験的な機能)。 2. 問題文にテストケースを追加(デフォルトでは無効ですが、設定ポップアップから有効にできます)。 3. 「問題」ページでの提出状況が確認できる。 4. テストケースのコピー・ダウンロードおよびコードテストを使ったデバッグができる。 バグが見つかった場合は、お知らせください 😃!!

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00
6 months0+0.0%+10.00
1 year+1,000+100.0%+30.00

Version history

33 versions recorded
0.3.87 Sep 2026
0.3.722 Dec 2025
0.3.615 Dec 2025
0.3.526 May 2025
0.3.323 May 2025
0.3.220 May 2025
0.3.130 Apr 2025
0.3.02 Feb 2025

Details

Category
Tools
First seen
10 May 2024
Size
134 KB
Languages
en
Pricing
Free
Extension ID
bflhekmjlbpdlibcmojpikplaldgceec

Permissions and risk

Low riskimpact 1, likelihood 2
Permissions
storageunlimitedStorage

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