Installed the latest update to Firefox Quantum 60.0.1 64 bit without any issues described by "sikntired" in the previous post... except when using FF other programs slower to load etc..
Looking at Task manager I see :
1 Firefox entry under apps using 227MB memory, then
4 Firefox entries @ Background processes using > 21.1 MB , 169 MB , 289.1 MB & 8.6 MB each
All that adds up to a whopping 714.8 MB , all this using just this one page.. when I open a new tab it starts a new process.. with 2 extra pages use another 150 MB memory !!
In comparison Pale Moon has one entry using 249.8 MB ... 2 extra tabs/webpages push it up to 438 MB
I have looked at the properties each of the 4 process details @ Background , they all say the same..: Firefox application , language neutral.. etc
Have run several different scans.. all come up clean .
All this on a Lenovo E530 laptop, Win 8.1 64 bit , all programs & Windows up to date & thankfully rare to have any issues at all.
Obviously something is amiss, would love some help sorting this.. please !