Hi,
I was trying to delete one month of history recently and I tried this a couple of times but each time it seemed like there was a runaway memory/CPU process and it really started pegging the CPU and memory usage kept ballooning until it was using close to 100% CPU and memory was 4-5 GB +
The browser became unresponsive and I had to end it from the Windows task manager.
However this didn't happen when I just deleted individual history items or sites.
Anyone else see this happening? It seems like it is a bug that should be looked at.
I'm on Windows 10 Enterprise x64 v.1809 and Firefox 66.0.5 64 bit.
Thanks!