What am I talking about?
https://github.com/Suwayomi/Suwayomi-Server
It's a lightweight docker/container/program for grabbing manga and comic from various sources such as mangadex, readallcomics, weebcentral etc and putting it on your desktop. It has no ads, it can download chapters and store them as individual images or chapter cbz.
It will even update automatically when there are new chapters of a series you bookmarked
You had my curiosity, now you have my attention.
well, you should try it. it's very useful. there's even an android apk