diff --git a/manifest.json b/manifest.json
index 25d3f090..e03241c2 100644
--- a/manifest.json
+++ b/manifest.json
@@ -4,6 +4,11 @@
 	"description": "__MSG_description__",
 	"homepage_url": "https://userstyles.org",
 	"manifest_version": 2,
+	"applications": {
+		"gecko": {
+			"id": "{46551EC9-40F0-4e47-8E18-8E5CF550CFB8}"
+		}
+	},
 	"icons": {
 		"16": "16.png",
 		"48": "48.png",