Haven't had any time to test properly.
But I did preview Kiwi Story about 30 times in chrome on my surface pro 4 which displayed the exact same memory issue leading to crash but in much smaller increments.
So it is not specific to my game.
The issue is not replicating in EDGE with my project though!
so looks like I can go ahead with development using EDGE, although it takes ages like (2 minute vs 10 seconds (actually it hangs for ages at 100%) to save (download) in EDGE for some reason and the layout view is very sluggish. Also every time I preview in edge it leaves an entry in the volume mixer (see below) ? could this be related to the memory issue?
My project is big not because there is any great content, but mainly because it is essentially still my first game and has a lot of legacy test textures and full length music files which I will sift through in coming days as I begin to get first pass placement art in.
anyway I will test Firefox and try to narrow it down, but it looks like it might be a chrome issue then..
If anyone reading has a reasonably large project I would really appreciate if you could do a test by previewing your project about 20 times (just keep clicking preview as soon as it loads) in chrome and monitoring the memory usage in task manager and report here.
or if you could test kiwi story (select a later level layout and preview layout rather than project so you go straight into the game, once it is in game just press preview again. on systems with lots of memory you might not notice it but with 8 GB it should become obvious after a while (about 30 previews) that your free system memory is going down.)
Multiple volume entries in EDGE ......?