diff --git a/dom/public/idl/base/MimeType.idl b/dom/public/idl/base/MimeType.idl
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/dom/public/idl/base/MimeTypeArray.idl b/dom/public/idl/base/MimeTypeArray.idl
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/dom/public/idl/base/Plugin.idl b/dom/public/idl/base/Plugin.idl
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/dom/public/idl/base/PluginArray.idl b/dom/public/idl/base/PluginArray.idl
new file mode 100644
index 00000000000..e69de29bb2d