> GMail

She can access her GMail account using a mail client like Thunderbird (which is deteriorating, but works), or any one of many other alternatives:

https://rigorousthemes.com/blog/top-free-open-source-email-c...

> Facebook

I could recommend avoiding that particular tar-pit, but if your mom is there, maybe try:

https://duckduckgo.com/?q=facebook+lite+desktop&ia=web

that's apparently a lighter-weight client, though I can't vouch for it.