Bug 1728741, increase max navigator.hardwareConcurrency, r=tjr

Threadripper may have 128 logical cores.

Differential Revision: https://phabricator.services.mozilla.com/D124447

modules/libpref/init/all.js

@@ -4252,7 +4252,7 @@ pref("plugins.rewrite_youtube_embeds", true);
 pref("media.default_volume", "1.0");
 
 // return the maximum number of cores that navigator.hardwareCurrency returns
-pref("dom.maxHardwareConcurrency", 16);
+pref("dom.maxHardwareConcurrency", 128);
 
 pref("dom.storageManager.prompt.testing", false);
 pref("dom.storageManager.prompt.testing.allow", false);