Problems with Ancestry

I see several posts going back to abt. 2013 reporting incompatibility of Safari with the app Ancestry. I had no problems with Ancestry until this last year, when it would have problems saving records, albeit intermittently. Numerous calls to Ancestry ended in frustration with their stock answer: clear your cache and try another browser. I was able to live with this on/off situation until about 3-4 weeks ago, when records on Ancestry suddenly started to display improperly. To be specific, I would bring up a record, the information for which had been transcribed, and there would be a thumbnail image of the basic record itself with a tab saying "click to view full record". This indeed would bring up the record, but would display only the top-left 1/8 of the page - whether it be a will, or a whatever document, rendering it useless. This phenomenon started about the same time I updated Mac OS to 10.15.5. Am running Safari 13.1.1. I don't recall when Safari was last updated. Whether this is pure coincidence or that Apple has now made some change that further exacerbates the problem with Ancestry, I don't know. How does one get to Apple to ask that question? In any case, I get no help from Ancestry - same story. So in desperation, as I have a countless number of hours invested in a massive family tree on Ancestry, I bit the bullet and downloaded Firefox. It runs slow vs. Safari on this app, but at least it seems to work, and I no longer have the problem with the display of partial pages. I have not tried Google Chrome, which is another browser that Ancestry recommends. I bought a Mac to try to live an Apple life!

My remaining issue is to wonder why the tech people of Apple haven't gotten together with Ancestry, a rather significant and broadly used app, to work things out and ensure that Ancestry works as well on Safari as with other browsers. Is there a technical obstacle to this? Does anyone at Apple read these postings to see what problems the "Apple Community" are experiencing?

Why should the Ancestry app be browser-specific? I do not encounter problems with Safari on ANY other website. Weird and frustrating that I have to use a different browser for just this one app! But yes!