Форум поддержки Firefox

Why can't I online shop with Mozilla? For months now I have had to go to another browser to use websites and make purchases. It doesn't happen 100% of the time, but enough to have me consider using a different browser permanently. I have used Firefox for years and don't want to change. But, when I need to purchase things or even pay bills and it won't let me continue on to a site, it's an issue. And yes, I have cleared cache and cookies and it doesn't seem to make a difference.

Specific examples: I logged into a store that I have purchased from before to make a new purchase. I can browse the website, but when I add to cart and try to check out, nothing. No message, not anything to help me know what the issue is. I go to Edge, pull up the site, and complete my transaction.

Today I tried to log onto a site that we just set up an account with yesterday. It's to be a guarantor on an apt for my son. We set up the acct and went today to finish the requirements and it won't let me access it. Just keeps scrolling. I go to Edge, log in with no trouble.

I am looking for suggestions/work flows for migrating existing Mac's from the standard firefox release to the ESR version. I am looking to manage these all under 1 update cycle. A couple of current problems:

1. On a system with the standard version already installed, I can't find a way to upgrade to the ESR version without uninstalling first.
2. Once I would do an uninstall and then an install of the new version, I am prompted that I have launched an older version of Firefox and that I must create a new profile. How can I do this without loosing all users bookmarks, extensions, etc?

Thanks!

FF 100 on Linux Mint 20 cannot access any websites. Tor can. TBird email can. I'm on an older Ubuntu with FF 94 writing this. How do I get back to previous FF? URGENT!!!