Website functionality in Safari is deteriorating
A number of websites now seem to be not functioning with Safari. In particular these seem to be where the links are embedded into images rather than hyperlinks on text. I have four websites that I use everyday now that do not work with Safari. Whereas they have been working in the last three months, they have now ceased to work. One of these in particular as an example is "spikizi" which when you go to the site, on its landing page it advises that it does not support Safari and to use Chrome instead. I am not downloading Chrome onto my iMac, but am having to use Mozilla Firefox instead. I am using iMac 2011 build, with High Sierra 10.13.6. I cannot update to a newer OS as High Sierra is the last update for this machine. The machine is perfect, like new, and works for everything else perfectly, except Safari. I have no need to change it.
Earlier Mac models