Please add “Custom Background Image and Gear Icon” as a core functionality.
Add-ons are often not compatible with the lastest Anki version. What if the developers of those add-ons go to heaven one day?
This is one of the most popular add-on. Almost everyone has this.
The developer of this add on don’t even know how to code. If he can do it, you can do it too!
(I am not a native speaker of English, so my English could be wrong.)