Regarding the Data Theft Prevention, it is a feature that compares the credential you want to filter on a website to prevent its theft. You may enter your whole credential to increase the filtering capability. But to permanently disable the pop-ups, you have to disable the feature itself.
An example is for the phone number filter. Instead of entering the last 4 digits to be filtered per web page, you may try to enter the whole phone number. This means it has to match that whole line of phone number first before a prompt to appear regarding the data theft prevention.
As another option is to use the Trend Micro Password Manager. You may use its secure browser feature as an alternative and you may disable the data theft prevention feature.