diff --git a/src/manifest.json b/src/manifest.json
index 6776bc3..b6ab507 100644
--- a/src/manifest.json
+++ b/src/manifest.json
@@ -8,7 +8,8 @@
 		"96": "icons/favicon.svg"
 	},
 	"background": {
-		"page": "background.html"
+		"page": "background.html",
+		"persistent": true
 	},
 	"browser_action": {
 		"browser_style": true,
@@ -30,5 +31,10 @@
 	"developer": {
 		"name": "Thomas Rupprecht",
 		"url": "https://blog.ximex.at/"
+	},
+	"browser_specific_settings": {
+		"gecko": {
+			"strict_min_version": "48.0"
+		}
 	}
 }