init

extension/inject.css

@@ -0,0 +1,4 @@
+@page {
+    margin: 0;
+}
+

extension/manifest.json

@@ -0,0 +1,13 @@
+{
+  	"name": "Print CSS",
+  	"description": "Change the default print css for pages",
+  	"version": "1.0",
+  	"manifest_version": 3,
+  	"content_scripts": [
+		{
+      		"matches": ["<all_urls>"], 
+      		"css" : ["inject.css"]
+    	}
+	]
+}
+