Content Encoding Error - firefox not able to load core javascript libraries when not preprocessed

Is this related to, or the same as, 🐛 Incorrect content-length header breaks HTTP/2 with net::err_http2_protocol_error Active ?

I can't reproduce this, could it be your nginx config?

Thanks for the double check.

I spent some time trying to pin it down but can't see anything in my nginx.

I've had other issues with the 'snap'
installed version of firefox and did a clean install - and this has fixed the issue - go figure.

Thanks for your help.