My ‘production’ system, which is what I normally run, is a late 2012 Mac mini running 10.8.5 (to maintain software compatibility with several programs that I don’t want to replace… or subscribe to). The browsers are as follows:
Firefox 48.0.2
Safaria 6.0.5
Chrome 49.0.2623.112 (64-bit)
As mentioned in my posting, other sites work just fine. I have gotten notifications about using older browsers, but as far as I can tell those sites still work as they have always worked. Also, I haven’t encountered problems with WordPress sites except for TidBITS.
If necessary, I can boot up into a Sierra partition. I normally don’t go to the TidBITS website, so I don’t know whether it’s worth your time to deal with this. Mainly I just read the TidBITS talk digest that I still get through my gmail account. Mainly, I’d like to change my account’s email address to match, but as far as I can tell, I’d have to do that through the Sierra partition if it’s possible.
Later edit:
I booted up my laptop with a system that’s more current, so here’s some more info:
MacBook Pro (mid 2010)
Yosemite (10.10.5)
menus work
Firefox 58.0.2
Chrome 65.0.3325.181 (Official Build) (64-bit)
menus don’t work
Safari 8.0.8