Bug 1730515 - FX doc: Use google search instead of sphinx search r=firefox-source-docs-reviewers,ahal DONTBUILD

sphinx search is pretty bad...

Differential Revision: https://phabricator.services.mozilla.com/D128022

docs/conf.py

@@ -71,6 +71,13 @@ templates_path = ["_templates"]
 source_suffix = [".rst", ".md"]
 master_doc = "index"
 project = "Firefox Source Docs"
+# Override the search box to use Google instead of
+# sphinx search
+html_sidebars = {
+    "**": [
+        "searchbox.html",
+    ]
+}
 html_logo = os.path.join(
     topsrcdir, "browser/branding/nightly/content/firefox-wordmark.svg"
 )