Bug 1699490 - Enable HTTP3 on Nightly and beta r=necko-reviewers,kershaw,preferences-reviewers,ntim

Differential Revision: https://phabricator.services.mozilla.com/D108970

modules/libpref/init/all.js

@@ -1411,7 +1411,11 @@ pref("network.http.spdy.websockets", true);
 pref("network.http.spdy.enable-hpack-dump", false);
 
 // Http3 parameters
+#if defined(EARLY_BETA_OR_EARLIER) && !defined(ANDROID)
+pref("network.http.http3.enabled", true);
+#else
 pref("network.http.http3.enabled", false);
+#endif
 
 // Http3 qpack table size.
 pref("network.http.http3.default-qpack-table-size", 65536); // 64k

toolkit/components/featuregates/Features.toml

@@ -164,7 +164,7 @@ preference = "network.http.http3.enabled"
 type = "boolean"
 bug-numbers = [1682539]
 is-public = true
-default-value = false
+default-value = {default = false, nightly = true, beta = true}
 
 [url-bar-ime-search]
 title = "experimental-features-ime-search"