They are referring to the fact that Firefox does the exact same thing as Chromium if certain settings are changed via enterprise policy. Here's a screenshot from my browser: https://i.imgur.com/pNMMKUC.png
I really don't understand why Debian wouldn't just patch the source code to change the default search engine rather than shipping an enterprise policy like this.
People sometimes absentmindedly misspeak. Either that happened and you can politely s/Firefox/browser/ so that the comment reads as a reasonable, even insightful contribution to the discussion, or the comment is utter nonsense and you can feel smug that you’re not as stupid as they must be. Granting the former interpretation is the more charitable option.
You should also understand that “Surely…” doesn’t mean the same thing as “I am sure”. “Surely…” is a plea for sanity.
Tell me what organization. "Debian" would have been perfectly fine to show here.