Hello @RussDude ,
I was able to log in and navigate in your account with any issue in all 3 of those browsers. Have you had a chance to perform any additional connectivity troubleshooting? Please try the following steps so we can eliminate them as possibilities for your connectivity issues:
If none of those alleviate the issues, could you please provide a screenshot of your speed test, including the More Info section? Once we have that we can do some more advanced troubleshooting as needed.
Apparently clearing the cache helped the situation and improved the interface. To me it is telling that the the cookies or other remainder items from the site cause similar behavior in multiple browsers. I was able to use an incognito type browser called Brave that enabled the site to work better. It blocks ads and cross links for privacy and speed.