I’m not the person you responded to, but I can say that it’s a perfectly fine take. My personal experience and the commonly voiced opinions about both browsers supports this take.

Unless you’re using 5 tabs max at a time, my personal experience is that Firefox is more than an order of magnitude more memory efficient than Chrome when dealing with long-lived sessions with the same number of tabs (dozens up to thousands).

I keep hundreds of tabs open in Firefox on my personal machine (with 16 GB of RAM) and it’s almost never consuming the most memory on my system.

Policy prohibits me running Firefox on my work computer, so I have to use Chrome. Even with much more memory (both on 32 GB and 64 GB machines) and far fewer tabs (20-30 at most vs 200-300), Chrome often ends up taking up far too much memory + having a substantial performance drop, and I have to to through and prune the tabs I don’t need right now, bookmark things that can be done later, etc..

Also, see https://www.techspot.com/news/102871-zero-regrets-firefox-power-user-kept-7500-tabs.html - I’ve never seen anything similar for Chrome and wasn’t able to find anything.

I use Waterfox and it never uses anything near that.

How come it has no value? I used to run Chrome but now I run Firefox. My browsing habits have not changed yet the memory consumption has greatly improved. It may not have any value to you but it certainly was a valuable experience for me and I made the comment hoping that it might find someone who is in the same situation as I was. I've got nothing to prove and nothing to gain. Anyone may run their own experiment.

but you have no idea how many or what kind of tabs either of us have,

Can't speak for you but I certainly do have an idea of how many and what kind of tabs I have and how many and what kind of tabs I used to have in Chrome.