diff --git a/src/backend/UpdateManger.ts b/src/backend/UpdateManger.ts
index dd92c7e..e523494 100644
--- a/src/backend/UpdateManger.ts
+++ b/src/backend/UpdateManger.ts
@@ -47,7 +47,7 @@ type SharedStatus = {
     outdated: boolean
 }
 
-abstract class Extension<Status>{
+abstract class Extension<Status extends SharedStatus>{
     constructor(
         protected name: string
     ){}
@@ -121,9 +121,15 @@ export abstract class FSExtension extends Extension<FSStatus>{
         }
         return status
     }
+
     public async isEmpty(): Promise<boolean>{
-        return true //TODO
+        if (!this.exists) return false
+        else {
+            const files = await fs.readdir(this.prefix)
+            return files.length === 0
+        }
     }
+
     public async exists(): Promise<boolean>{
         try {
             await fs.access(path.resolve(this.prefix, this.name))