As a webcomic author, I'm not too keen on the extent to which your site overlays someone else's site, essentially replacing their navigation buttons with your own.
I've seen other webcomic browser sites that load a webcomic site in what is more or less a separate frame, which bothered me less. Also, those always had a button in their own frame's UI that would remove their site entirely, sending you to the webcomic site itself. Yours doesn't seem to offer that--I couldn't find a way to remove your UI and just be on the webcomic site.
Although I did notice that (this was browsing Perry Bible Fellowship through your site) if I browsed using the PBF comic navigation buttons instead of yours, when I went back to your site, it didn't have the other comic pages I browsed to the the PBF controls marked as "read." This could, I suppose, be a little confusing to someone trying to make use of your unread/read flagging.
Also confusing is the date you list for each webcomic page--in the two comics I looked at, each comic page was listed with the same date. The way the date is presented, it looks like it's meant to be the date on which that page's comic appeared--but obviously, that isn't working, because those comic pages were not originally published on the same date.
Oh, and you're using logo artwork and low-res page artwork from the webcomics in the thumbnails and page previews on your own site. If that's without the permission of the respective webcomic authors, that isn't super cool.
Your "Find comic or episode" search function seems to time out ("Firefox has detected that the server is redirecting the request for this address in a way that will never complete") if I type a word (or gibberish) into it for which it has no matches ( http://webcomic.zone/?s=zahalh
, for instance).
It's difficult to tell how the entries on your "Most recent episodes" page are sorted; there are comics dated 2016 mixed in with comics dated from the last few days, and even those recent ones go in strange order. For instance, the top of the list currently goes
March 28, 2018
March 31, 2018
October 12, 2016
March 30, 2018