snippsysnappsy

I just checked on Thunderbird and ProtonMail: Thunderbird Windows: works ProtonMail desktop Win: works ProtonMail android: fails ProtonMail web: works

Sorry if it's not kosher, but as I too was looking for this, I found this: https://www.campaignmonitor.com/css/filters/backdrop-filter/ According to this, it's only possible with AOL, Apple 10 Mail, Outlook for...