Diễn đàn hỗ trợ Firefox

I received an email suggesting that I update my Firefox or I would lose syncing function. I have two computers. A fairly new iMac Ventura 13.6.8 running Firefox 123.0 64 bit which it says is up to date. But I also have an older iMac OSX 10.11.6 El Capiten running Firefox 78.15.0 ESR. I can't update the OS or Firefox on the old computer. So if I do nothing - will I still be able to sync on the newer Mac. I'm not too worried about the old one - I don't use it much for browsing - more for documents. Thank you. David Rimell

When I login to amazon, it asks my user name (normal), then asks my password (normal), then when it sends a code to my phone, it freezes the entire browser and I have to force quit Firefox. Been happening a week, I've cleared history, run several programs (Malwarebytes and CCleaner-with normal results) and restarted my computer (Macbook Air running Sequoia 15.6.1). Any fix for this?

Aliexpress.us will not load - Firefox cannot/will not redirect. Cleard cookies/catch, etc.- put exception for website in privacy. No change. Safari loads website just fine. Any ideas? OSX 15.2