initial version

addon/background.js

@@ -0,0 +1,29 @@
+function onResponse(response) {
+    if (!response.success) {
+        console.error("Error setting attributes");
+    }
+}
+
+function onError(error) {
+    console.log(`Error: ${error}`);
+}
+
+function handleChanged(delta) {
+    if (delta.state && delta.state.current === "complete") {
+        browser.downloads
+            .search({
+                id: delta.id,
+            }).then(downloads => {
+            let download = downloads[0];
+            browser.runtime.sendNativeMessage("originfox", {
+                path: download.filename,
+                origin: download.url,
+                referrer: download.referrer,
+            }).then(onResponse, onError);
+        });
+
+
+    }
+}
+
+browser.downloads.onChanged.addListener(handleChanged);

addon/manifest.json

@@ -0,0 +1,19 @@
+{
+  "description": "Save download origin data to extended attributes",
+  "manifest_version": 2,
+  "name": "originfox",
+  "version": "1.0",
+
+  "browser_specific_settings": {
+    "gecko": {
+      "id": "originfox@icewind.nl",
+      "strict_min_version": "50.0"
+    }
+  },
+
+  "background": {
+    "scripts": ["background.js"]
+  },
+
+  "permissions": ["nativeMessaging", "downloads"]
+}