no bug - editor doc: highlight that vscode is the recommended editor r=marco DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D141090

docs/contributing/editor.rst

@@ -6,6 +6,12 @@ text files. However, there are some steps specific to mozilla-central that may
 be useful for a better development experience. This page attempts to document
 them.
 
+.. note::
+
+    Visual Studio Code is the recommended editor for Firefox development.
+    Not because it is better than the other editors but because we decided to
+    focus our energy on a single editor.
+
 .. note::
 
     This page is a work in progress. Please enhance this page with instructions

docs/contributing/vscode.rst

@@ -6,6 +6,7 @@ General Knowledge
 
 `VSCode <https://code.visualstudio.com/>`__ is a multi-platform open-source programming editor developed by Microsoft and volunteers.
 It has support for many programming languages using extensions.
+This is the recommended editor for Firefox development.
 
 For more general information on the VSCode project see `repo <https://github.com/Microsoft/vscode/>`__.