Question: Given that gmail can be compromised, even 2 factor auth. Why aren't there any extensions that would make it easier to use a public key while keeping t

Question: Given that gmail can be compromised, even 2 factor auth. Why aren't there any extensions that would make it easier to use a public key while keeping the gmail data encrypted? Yes, I understand that gmail is not eager to encrypt the emails but users would be will to do it if there was a simple extension in chrome or firefox. Using an extension would have saved many from email hacks in the past year. Yes, it would still be available on the user's machine but it would certainly add another level of security.