Please note that regardless of the product the current behavior is inconsistent not just with the previous versions of macOS, but also within the current one: it's strange that iCloud Private Relay behaves differently with and without the Firewall. The bug is still there in macOS 15.1, but there's a slight change as if there was attempt to fix it, but it gets back 5-10 minutes later.

This is actually a very good question, doing anything in the extension is quite problematic with a limit that low. For instance, our use case is simple: we pass settings from the main app via a file. That file weighs more than 2MB so reading it is already problematic. We have to use some ugly workarounds and pass it in chunks instead.

@dverevkin Denis, please take a look at this issue: https://github.com/dart-lang/sdk/issues/45116 It'd be useful if you could supply info about your patch there.

Any chance anyone from Apple could reply?