Bug 2010739: Disable Compression Dictionaries a=pascalc

Original Revision: https://phabricator.services.mozilla.com/D279239

Differential Revision: https://phabricator.services.mozilla.com/D279241

Author: jesup

modules/libpref/init/StaticPrefList.yaml

@@ -15902,7 +15902,7 @@
 # Enable HTTP Compression Dictionary support
 - name: network.http.dictionaries.enable
   type: RelaxedAtomicBool
-  value: true
+  value: false
   mirror: always
 
 #---------------------------------------------------------------------------