Bug 1646240 - Default to visual selection direction on non-Linux Nightly r=jfkthame

Differential Revision: https://phabricator.services.mozilla.com/D79939

modules/libpref/init/StaticPrefList.yaml

@@ -697,7 +697,11 @@
 # 2 = visual, but logical during selection
 - name: bidi.edit.caret_movement_style
   type: int32_t
-  value: 2
+#if !defined(XP_LINUX) && defined(NIGHTLY_BUILD)
+  value: 1
+#else
+  value: 2 # See Bug 1638240
+#endif
   mirror: always
 
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