https://developer.mozilla.org/en-US/docs/Glossary/Chrome
https://www.nngroup.com/articles/browser-and-gui-chrome/
> 'Chrome' is the user interface overhead that surrounds user data and web page content.
Browser/GUI's "chrome" terminology existed before google "chrome" browser. That's why you use "userChrome.css" to modify the visual look by yourself.
https://developer.mozilla.org/en-US/docs/Glossary/Chrome
https://www.nngroup.com/articles/browser-and-gui-chrome/
> 'Chrome' is the user interface overhead that surrounds user data and web page content.
Browser/GUI's "chrome" terminology existed before google "chrome" browser. That's why you use "userChrome.css" to modify the visual look by yourself.