Safer Internet: Browsing: Shopping

Summary

"Remote shopping, while entirely feasible,...
[1] Use Correct, Secure Site / App
[1] Protect Credit Card Info: store in password manager -- not browser, not vendor site
Provide a temporary (instead of your actual) credit card number,
e.g., Apple Pay; Virtual Account Number (Citi), digital wallet,
privacy.com linked to debit card or checking account, with 1Password integration,
when possible, esp. for one-off purchases on smaller / lesser-known sites
[2] Consider other Forms of Payment, e.g., Paypal; [3] Cryptocurrency?
References

[1] Use Correct, Secure Site / App

Many of these already covered in other sections:
Be sure to navigate to correct web site, esp. not via ads / impostor links
Use HTTPS: for login & entering contact / payment details -- see section
Clear purchase history on sites?
If using an app, make sure it's authentic & up-to-date: app store, exact name, ratings, etc.

[1] Protect Credit Card Info

Save credit card info in a password manager rather than browser -- more secure, sync across browsers/platforms
macOS: Safari > Preferences > AutoFill > Credit Cards: off
iOS: Settings > Safari > AutoFill > Credit Cards: off
Avoid storing credit info on merchant site, if possible -- though some may require a card on file
This should be less of an issue for major vendors, e.g., Amazon, Apple -- who can invest more on security
If you misplace your card, you can lock your card with some credit card companies (and unlock it later when you find it).
Check your credit card statements monthly, or more frequently, to detect fraudulent charges
Enable account notifications (email/text) if supported, e.g.,
for an international charge
for an online, phone or mail charge
for an amount over $x
Check Apple Pay (or similar) settings, if applicable
iPhone: Settings > Wallet & Apple Pay
iPhone: Settings > Safari > Check for Apple Pay
Rank credit cards by importance and impact; what happens if one is compromised?
Use different credit cards for different purposes/sites, e.g., online only, regular automatic payments, one-time purchases with new vendors, etc.
A single-use, virtual credit card number linked to a credit card (or bank account) provides additional security
Virtual Account Numbers creates a temporary credit card # & security code; you set expiration date and credit limit; e.g., Citi not avail for Costco Visa apparently
Bank of America formerly offered virtual card numbers via "ShopSafe", which has now been discontinued in favor of Digital Wallets?
Check with your bank or credit card company

[2] Consider other Forms of Payment

PayPal can be linked to checking account or credit card; vendor doesn't see credit card info
Downsides: yet another account; does not provide same protection for contesting charges; may block some quasi-legal purchases, which use VPN or violate their definitions of copyright, decency, etc.
Other services can be used to transfer cash, e.g., Square, Messenger, Venmo -- understand possible fees and consumer protections
[3] Avoid cryptocurrency, e.g., Bitcoin
Although a cryptocurrency might provide more anonymity and can be used to hide transactions, it's also unreliable, variable and hackable; also, definitely not an 'investment'