Hi Dandroid,

yes, you are right, the background image does remain.
On further inspection Reddit performs a page load once the user performed the age verification (or confirmed the "Yes, I'm over 18" dialog).
Only after this page load the actual content of the page becomes available.
Meaning, the extension simply can't function for this use case (v0.11.0), unfortunately.
I might look further into this at some point, but for now I will remove the mention / add a note of this in the extension description and release notes, so that its transparent.

As a solution: stay logged out when using the extension to browse NSFW content.