Add private_dot_librewolf/.keep

Add private_dot_librewolf/native-messaging-hosts/.keep
Add private_dot_librewolf/native-messaging-hosts/org.kde.plasma.browser_integration.json

private_dot_librewolf/native-messaging-hosts/org.kde.plasma.browser_integration.json

@@ -0,0 +1,7 @@
+{
+  "name": "org.kde.plasma.browser_integration",
+  "description": "Native connector for KDE Plasma",
+  "path": "/usr/bin/plasma-browser-integration-host",
+  "type": "stdio",
+  "allowed_extensions": ["plasma-browser-integration@kde.org"]
+}