YouTube Comment Custom CSS Tester icon

YouTube Comment Custom CSS Tester

by キィー · kii-memo.blogspot.com · Tools
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 19 Oct 2026

Custom CSS Tester Tool for YouTube Comment Viewing UI

Users
82
−3 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#91K
#76K among extensions
Version
0.1.3
updated 20 Aug 2024

Users

monthly, 3 years
34484Aug 2023Apr 2025Oct 2026
Latest, 19 Oct 2026: 82 usersMove the mouse over the chart for any month

Ratings count

monthly, 3 years
001Aug 2023Apr 2025Oct 2026
Latest, 19 Oct 2026: 1 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 YouTube Comment Custom CSS Tester

This custom CSS tester allows you to load a custom CSS to a YouTube Live Chat Comment page on your Web browser so that the CSS customized version of the page can be inspected on the browser. The CSS loaded to the page can be debugged with browser's built-in developer tools (Hit F11 key on many popular browsers.). Please start in the extension's option page to set-up a Live Chat comment URL. Once a comment page is opened on a new tab, the extension's popup page can be used to temporarily edit and hot-reload the custom CSS inserted by this extension. Support Page: https://kii-memo.blogspot.com/p/cas-akaji-bot.html (In Japanese)

Growth

WindowUsersChangeRatingsRating
7 days−6−6.8%00.00
30 days−3−3.5%00.00
6 months+16+24.2%00.00
1 year+19+30.2%00.00

Version history

8 versions recorded
0.1.323 May 2024
0.1.221 May 2024
0.1.114 Mar 2023
0.1.030 Aug 2022
0.0.523 Apr 2022
0.0.327 Mar 2022
0.0.24 Feb 2022
0.0.119 Dec 2021

Details

Category
Tools
First seen
19 Dec 2021
Size
35 KB
Languages
en, ja
Pricing
Free
Support
kii-memo.blogspot.com
Extension ID
jamdfahhlffjdnmfmjmakbinalkhahjm

Permissions and risk

Low riskimpact 2, likelihood 1
Permissions
activeTabstorage
Site access
https://www.youtube.com/live_chathttps://studio.youtube.com/live_chat

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