"Moving the goal posts" I fail to see how I'm changing the conditions. I'm explaining a clear and obvious issue in that image which is why it's not a good comparison.

Okay, extensions require container processes, for each one. Each new extension add to the RAM usage. For both Firefox and Chrome.

So already the comparison is flawed because Firefox now requires more base memory to load those extensions out the gate.

But now, Firefox is clearly showing Tampermonkey in the toolbar, a userscript extension. Let's just say I run a script that fetches competing price info from temu.com when you browse a site like amazon. Not uncommon.

Let's say I set that to loop, so it'll work on infinite scroll pages too.

Okay, now if you leave your browser alone for an hour and it's refreshing these scripts, guess what happens to the memory?

Every test of current builds of FF vs Chrome has found extremely negligible performance differences when both are stock installs.