My wife and I use Firefox for banking, Amazon, and other companies. Any site that doesn't work under Firefox, I use Chrome or Microsoft Edge. Looks like I need to switch to Chromium instead?

I think Chrome, Edge, and Brave are all Chromium-based, so you won't need to switch. You can use Chrome Mask on Firefox for such sites: https://addons.mozilla.org/en-US/firefox/addon/chrome-mask/

Edit: I researched a little more. For typical users and use cases, Firefox works ok (better with privacy extensions). What the article describes is more like browser-engine-based targeted attacks.

Well.. you should have in 2020 (22 points, 10 comments) https://news.ycombinator.com/item?id=26954225 (2020: https://news.ycombinator.com/item?id=24138487)

Does anybody know what has changed in the last few years?

(2022)