Netscape called it that and thus so does Mozilla. Try loading up `chrome://branding/content/about-logo.png` for an example of the chrome URI scheme in Firefox!
Around the turn of the century, the "Mozilla" browser used to support themes for its chrome, written in XUL [0], which also supported inline images. The themes were available in a repository called "Chrome Zone".
Google later appropriated also the name "Chrome Zone", for a chain of retail stores in the UK. [1]
Specifically google originally chose that name for chrome because one of their goals was reduction of chrome. They made a bit deal out of it when the browser was new, how it didn't have a bunch of menu bars or whatever
https://developer.mozilla.org/en-US/docs/Glossary/Chrome
http://www.catb.org/%7Eesr/jargon/html/C/chrome.html
Netscape called it that and thus so does Mozilla. Try loading up `chrome://branding/content/about-logo.png` for an example of the chrome URI scheme in Firefox!