What can be the reason for Firefox taking all the memory?
It crashes my computer session pushing me to the logon screen several times a day by taking all the memory (of the 16GB total). It's the recently updated ESR version 140.9.1esr.
It was absolutely servicable before they switched to UWP and started to remove functionality. Recently they removed the menubar in File Explorer (can still be restored in 25H2 via ViVetool).
I am sure this has greater responsiveness:
You made an UWP taskbar and it took many years to restore some funcrions that u deleted, and now you are switching to WinUI3.