On the latest macOS 10.15 Beta release (19A501i) testing Firefox Nightly version 70, while handling a crash, the minidump-analyzer process is crashing. After starting Firefox from the terminal, the follow error is printed.

dyld: Library not loaded: @executable_path/libmozglue.dylib
  Referenced from: /Applications/Firefox Nightly.app/Contents/MacOS/crashreporter.app/Contents/MacOS/minidump-analyzer
  Reason: image not found

Console.app also logs that the minidump-analyzer process is crashing.

I don't know yet if this is related to Notarization, but we have macOS Notarization turned on for build 69 and newer releases. Starting with macOS 10.15, Notarization/Hardened Runtime is required and Hardened Runtime enforces new restrictions. The Hardened Runtime entitlements we use for official builds is here: https://searchfox.org/mozilla-central/source/security/mac/hardenedruntime/production.entitlements.xml

I can't reproduce this on the latest Catalina Beta which is Beta 6 (19A536g). Closing as "works for me".