If that isn’t something you have thought about before, Google is here to help as the company has since announced that in an upcoming update to Chrome, they will start warning users about forms that might be insecure. While these forms can still be filled out, there will be a warning attached and Google will also disable the Autofill feature in Chrome.
According to Google, “Beginning in M86, Chrome will warn users when they try to complete forms on secure (HTTPS) pages that are submitted insecurely. These “mixed forms” (forms on HTTPS sites that do not submit on HTTPS) are a risk to users’ security and privacy. Information submitted on these forms can be visible to eavesdroppers, allowing malicious parties to read or change sensitive form data.”
Google already warns users when they visit a website that still uses HTTP instead of HTTPS, so these changes to Chrome don’t really come as a surprise. We should note that while some forms might not be secure, it doesn’t mean that they are malicious either. Some web developers might have not made the switch to HTTPS, so if you want, you can still proceed with it.