You might try a quick shell script to set NSPR_LOG_MODULES and NSPR_LOG_FILE to “all” debug mode to fish for some clues. https://firefox-source-docs.mozilla.org/nspr/reference/nspr_log_modules.html#nspr-log-modules

+1 on Howard Leights - popular in the shooting sports (USPSA/IPSC, IDPA, ICORE, etc.) for their effectiveness and ability to adjust sensitivity. Comfortable for long periods and last forever even when lightly abused in outdoor environments.