I think he means Firefox is not Chromium-based; Chrome is a proprietary code base, no one can access it besides internal Google employees. Chromium, on the other hand, is open source, and is what browsers such as Edge, Brave and Opera are based off of. Chrome is also based off Chromium, it’s the closed source browser Google distributes. Think of Chromium as Android, and the Pixel UI as Chrome. So no, I doubt he means Firefox is Chrome.
Edit: seeing from the other comments, downvotes, and that the comment has been edited, he most likely made a typo and typed “Firefox is chromium.”
Edit 2: Mistakenly said that Chromium was what Firefox was based off of when I meant to say Brave. My bad. I’m well aware Firefox isn’t Chromium-based(I use it for that reason), I was just confused as to why this person was saying he meant Firefox was Chrome, when the comment read “firefox is not chromium”. I later realized(in the above edit) that they must have written “firefox is chromium”, before editing it to “firefox is not chromium” after realizing he messed the comment up.
Incorrect dukk. Firefox isn’t built on Chromium, Firefox predates google let alone Google chromium.
I’m not saying Firefox uses Chromium? I specifically said that Firefox ISN’T based off Chrome/Chromium.
Edit: Never mind, I see that I messed up the post.
Firefox is the only major browser standing today that’s not based on Chromium, so you’re right there.
Firefox does not predate Google. Firefox is a descendant of Mozilla, which started as a broken chunk of quickly open sourced Netscape Navigator 4.0 code. Netscape’s engineers ripped out everything they didn’t hold a license to and dumped it raw (and uncompilable) on the web for the OSS community to rebuild. This happed just before Netscape was finished being acquired by AOL.
AOL did rebrand Netscape Navigator as AOL Browser, but it didn’t gain any significant market share.
Google was founded about the same time (about two years later) as Netscape Navigator was released. So, you can either say Firefox’s history is older than Google or the actual Firefox project is younger than Google.