A number of browser icons were "removed" from the donation, in this changeset. They weren't actually removed, rather they were all replaced with a dummy NetBeans icon. I think Oracle removed them because Oracle couldn't donate such icons, as they don't "own" these trademarks.
Removed from css.editor:
The browser icons in this module are - as far as I can tell - only used for code completion hints on CSS where they are used to signal if the browser has support for the CSS property or not. Example:
Removed from web.browser.api:
The above icons are all replaced in the donation with a dummy NetBeans icon:
I'll do a PR to re-instate these.