Unfortunately, removal of PIIs also means less data/cues for hard-to-diagnose bugs (it can even range to CPU bugs like [1]). For Firefox, potentially PII-containing memory dumps are still sent to the server, but they're only viewable by authorized personnel [2].

There are also rule-based PII removal methods as used by Sentry minidump processing and described at [3].

[1]: https://news.ycombinator.com/item?id=37063459

[2]: https://crash-stats.mozilla.org/documentation/protected_data...

[3]: https://docs.sentry.io/product/data-management-settings/scru...