Originally Posted by
Prospero
I was also experiencing performance issues similar to those described above browsing the site on my 2019 iMac (Mac OS 10.15.2, Firefox 72.0.1). No such problems on my iPad and iPhone though.
I installed and ran CCleaner. What a difference, pages are now appearing instantly.
This is an update which hopefully might help others.
Running CCleaner helped but after a few days FT would slow down again, so it was a case of rinse and repeat.
i was experiencing other performance issues with my iMac, particularly Finder which behaved sluggishly. This led me to think my Mac OS X system wasn’t quite right - while the hardware was new, the system had migrated over from an older iMac. So I scrubbed the hard drive and ran a clean install of Mac OS.
What a difference. The system, Firefox, FT have been firing on all cylinders since.