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Fixes in the spirit of https://bugzilla.mozilla.org/show_bug.cgi?id=1571734
; network.trr.blacklist-duration :
(default: 60) is the number of seconds a name will be kept in the TRR blacklist blocklist until it expires and then will be tried with TRR again. The default duration is one minute.
Entries are added to the TRR blacklist blocklist when the resolution fails with TRR but works with the native resolver, or if the subsequent connection with a TRR resolved host name fails but works with a retry that is resolved natively. When a hostname is added to the TRR, its domain gets checked in the background to see if the whole domain should be blacklisted blocklisted to ensure a smoother ride going forward.
; network.trr.request_timeout_ms :
(default: true) When true, the DNS+TRR cache will be cleared when a relevant TRR pref changes. (uri, bootstrapAddress, excluded-domains)
== Dynamic Blacklist Blocklist ==
To keep the failure rate at a minimum, the TRR system manages a dynamic
persistent blacklist blocklist for host names that can't be resolved with DOH but workswith the native resolver. Blacklisted Blocklisted entries will not be retried over DOH for one minute.
"localhost" and names in the ".local" TLD will never be
resolved via DOH.
