FireFox 62 Very Slow

[MikeM3]

Good morning,

I have a real problem which has started only today,
anything that I try takes a very long time.

I cleared the cache which had 310 MB in it,
I have an HP Desktop with AMD A-6 5200 APU (quad core) 2.00 GHz
Installed Memory 8 Gb

Never before has my machine gone so slow, short of a component
breaking down, I suspect FireFox as somebody in a forum stated
the same thing last week.

Is there anyway to fix this?

Thank you.

Mike.

[Brummelchen]

Slowness is special, not general. Tried Safe-Mode or fresh profile? Which antivirus?

[DanRaisch]

Have you tried starting Firefox in Mozilla Safe Mode? http://kb.mozillazine.org/Safe_mode
If no improvement using Safe Mode, do you have the same problem if you create a new profile and test it with no extensions or non-default themes installed?
http://kb.mozillazine.org/Profile_Manager
and
http://kb.mozillazine.org/Creating_a_ne ... on_Windows

[MikeM3]

I re-booted the PC, ran Malwarebytes after Rkll, no problem found!

Switched off the PC for several hours and when I switched back on
no slowness anymore, strange.

Thank you for taking the time to read my question and to answer it.

Mike.

[Brummelchen]

Maybe some windows update interfering. Reboot is mandatory from time to time in uefi mode.