Latest update incredibally slow

[i_am_jim]

Mozilla installed a Firefox update this morning without asking (in options I require consent before intalling). This update has not only made it very slow but now it hangs. I've had to restart twice to post this message. I've had a similar problem with FF in the past, but this is too much. Does anyone know a fix or am I going to have to abandon the browser I've been using for many years?

[tnffuser]

I too have noticed this.
The animated thingy in the tab runs back and forth for 10 to 20 seconds before loading a site.
There is a lot of 'handshaking' being shown at the bottom left of screen during this timeframe.

[therube]

Any change if you restart in Safe Mode?

[i_am_jim]

It had affected the overall performance of Windows 10. I restored to the day before and everything's fine so it was definitely the FF update. I've now turned off ALL updates. We'll see it it honors that.

[josegotme]

Lightning fast on three machines.