The relevant: Manifest V3 drops support for filter list updates. Adblocker updates, even if only filter list updates, need to go through the Chrome Web Store extension update approval process.

When Manifest V3 becomes mandatory, those updates that need to arrive “at minimum on a daily basis” will no longer be an option. Limiting remotely hosted code sounds like a totally reasonable limitation until you realize that. like most Manifest V3 changes, it seems carefully crafted to cripple ad blockers more than other extensions. Is a filtering list update, which is essentially just a list of websites, really something that needs to be limited by the “no remotely hosted code” policy?

So since all filter list updates now need to go through the Chrome Web Store, how long does a review take? Multiple sources on the web put it at anywhere from a few hours to three weeks, depending on the whims of Google’s review system. Keep in mind these timelines are before Google will dramatically increase the workload of Chrome Web Store reviews by requiring absolutely all changes to go through the review process.