From my experience, blur/transparency only works consistently on default themes (Breeze). It might work on some themes, however, any update could potentially break the blue/transparency effects.

I am so very hyped. Also I’m ready to be disappointed, but I’m so ready

Nice :)

I also go to Settings > site permissions (or the equivalent) and block requests from sites

I think you are actually clicking the magnifying glass “-” which unzooms it. Try clicking hamburger icon again to retain zoom level