Can't receive JSON larger than 128KB by POST

Windows10, FireFox 97.0.1

When accessing Web API by POST from FireFox, if the JSON returned as the response exceeds about 128KB, FireFox does not respond to the response and remains in the standby state.
Perhaps there is a size limit around 128KB, but should I set it so that it can receive larger sizes?

I have confirmed that the following browsers other than the following can receive even large JSON without problems.
Chrome for Windows
Edge for Windows
Safari for Mac OS
Chrome for chromebook

The client-side processing is written in Blazor WebAssembly, and the Web API is written in .NET 6.