Bug 1800273 - Disable network.cookie.sameSite.schemeful, r=freddyb

Differential Revision: https://phabricator.services.mozilla.com/D167903

modules/libpref/init/StaticPrefList.yaml

@@ -10958,7 +10958,7 @@
 
 - name: network.cookie.sameSite.schemeful
   type: bool
-  value: true
+  value: false
   mirror: always
 
 - name: network.cookie.thirdparty.sessionOnly