In my recent experience: definitely yes, though not significantly worse. Unless you have [many] hundreds of tabs open (which I do as I have neither executive function nor organisational skills), or have a machine with very limited RAM, I don't think you'll notice a difference.
replyThis is anecdata, of course, take with a pinch of your preferred flavouring powder.
Chrome on Windows is running with thousands of tabs "open" over dozens of windows, but it does practically max out on a certain number of tabs per window (not just the GUI, but something in the memory architecture), and it does stack fat cache which will crash the whole thing if it digs deeper than your available space.
replyWindows even runs (semi-playably) 2020's shooters in this condition, though you need to kill any windows close to the tab limit that are full of recently opened tabs.
[Yes, I know, the horror]
Yes: https://www.phoronix.com/review/firefox-chrome-2026/4
reply> Chrome also came in at slightly lower memory consumption across all the benchmarks with total memory usage on average at 4.67GB to Firefox at 4.83GB.