Description from extension meta
Custom CSS Tester Tool for Twitch Comment Overlay
Image from store
Description from store
This extension allows you to load to a Twitch Live Chat Comments Overlay along with a custom CSS being applied on your browser so that a CSS customized version of the page can be viewed on the browser.
The CSS loaded to the page can be debugged with browser's built-in developer tools.
Please start in the extension's option page to set-up and open a chat comments overlay URL and your custom CSS. Once an overlay page is opened, the extension popup can be used to temporarily edit and hot-reload your custom CSS.
By using this extension, you can easliy update and check erros on your custom CSS for the Twitch overlay on the fly.
Support Page:
https://kii-memo.blogspot.com/p/custom-css-tester-twitch.html (In Japanese)
Twitch Chat Overlay CSS Customizer - Prototype:
https://kiimemo.blogspot.com/2024/08/chat-overlay-custom-css-for-twitch.html