Here are my experiences with Mypal 68 until now.
Windows XP Professional with all POSReady updates is installed on a very old computer with an Intel Pentium Northwood 2.80 GHz CPU (single core, 32 Bit), 1.5 GB SD-RAM and a NVIDIA GeForce 6200 graphic card.
My settings in about:config are:
dom.ipc.processCount -> 1
browser.tabs.remote.autostart -> false
That means I use the browser in single process mode only.
Running Mypal 68 with 5 extensions and one empty tab, it consumes 245 MB of RAM.
Running Mypal 68 with 5 extensions and three loaded tabs (Google, MSFN, Github), it consumes 349 MB of RAM.
For me, perfect values especially regarding my low hardware resources. Mypal 68 is working fine and flawlessly. The overall performance is perfect, cumbersome web sites are loading fast without permanent processor load as I always observe in roytam's releases. I am totally happy, regarding the early state of development. Of course, a lot of functions are missing, (un)installing of extensions is not working properly and some sites fail to work as they should do, but anyway, for an early build very impressive. I'm looking forward to the next releases.
So long!
AstroSkipper