my.yahoo via Safari
I've used my.yahoo.com as my homepage for several years, on a variety of Macs, always using the Safari browser. In the past few days, it won't load. Actually, it will load and a small fraction of a second later will swap to a page saying that my personal content is not available. If, instead of Safari, I use Firefox, all is well. What's up? (help.yahoo.com doesn't help at all, in any way.)
MacBook Pro with Retina display