Safari freezing on Weather Underground and other pages
In the past week or so Safari keeps freezing on some website, e.g. Weather Underground. I'm an avid cyclist so I use this app all the time. I get the spinning ball and can't open any of the tabs. I can't open other page with but I can switch to open tabs of other pages. I can access WU just fine in Chrome. I've noticed the same lately on other sites, e.g. I couldn't login to my local online newspaper's E-Edition in Safari but I can in Chrome. This is another site I access multiple times/week.
I've reviewed my website permissions in Safari's preferences and have allowed everything, e.g. location sharing, auto play media, pop-ups, etc. I have also turned off or removed all my extensions with the exception of Last Pass.
Each time I've changed the preferences I've closed Safari and then re-opened it to see if it has fixed the problem.
I'm running the latest version of Catalina and always update my OS and apps promptly.
iMac 27", macOS 10.15