on one website, I always have 2 or 3 minute delays that i dont have with chrome or other websites. cache etc all cleared.

Windows 11. I am the web manager for tunbridge wells u3a. The site is hosted by the national u3a and uses their templates etc. On edge and chrome, it works fine, but not on Firefox. Several months ago, the page operations (save, open, change, etc took a few minutes to complete, with the message bottom left about waiting for the host site. All of the usual cache clearing, reboots etc made no difference.