diff --git a/components/net/fetch/methods.rs b/components/net/fetch/methods.rs
index 3cc177c342a..3aa301c52ef 100644
--- a/components/net/fetch/methods.rs
+++ b/components/net/fetch/methods.rs
@@ -820,10 +820,10 @@ async fn scheme_fetch(
 
             let (id, origin) = match parse_blob_url(&url) {
                 Ok((id, origin)) => (id, origin),
-                Err(()) => {
-                    return Response::network_error(NetworkError::Internal(
-                        "Invalid blob url".into(),
-                    ));
+                Err(error) => {
+                    return Response::network_error(NetworkError::Internal(format!(
+                        "Invalid blob URL ({error})"
+                    )));
                 },
             };
 
diff --git a/components/shared/net/blob_url_store.rs b/components/shared/net/blob_url_store.rs
index ab853b702c9..5e487b8038d 100644
--- a/components/shared/net/blob_url_store.rs
+++ b/components/shared/net/blob_url_store.rs
@@ -41,20 +41,24 @@ pub struct BlobBuf {
 /// Parse URL as Blob URL scheme's definition
 ///
 /// <https://w3c.github.io/FileAPI/#DefinitionOfScheme>
-pub fn parse_blob_url(url: &ServoUrl) -> Result<(Uuid, FileOrigin), ()> {
-    let url_inner = Url::parse(url.path()).map_err(|_| ())?;
+pub fn parse_blob_url(url: &ServoUrl) -> Result<(Uuid, FileOrigin), &'static str> {
+    let url_inner = Url::parse(url.path()).map_err(|_| "Failed to parse URL path")?;
     let segs = url_inner
         .path_segments()
         .map(|c| c.collect::<Vec<_>>())
-        .ok_or(())?;
+        .ok_or("URL has no path segments")?;
 
-    if url.query().is_some() || segs.len() > 1 {
-        return Err(());
+    if url.query().is_some() {
+        return Err("URL should not contain a query");
+    }
+
+    if segs.len() > 1 {
+        return Err("URL should not have more than one path segment");
     }
 
     let id = {
-        let id = segs.first().ok_or(())?;
-        Uuid::from_str(id).map_err(|_| ())?
+        let id = segs.first().ok_or("URL has no path segments")?;
+        Uuid::from_str(id).map_err(|_| "Failed to parse UUID from path segment")?
     };
     Ok((id, get_blob_origin(&ServoUrl::from_url(url_inner))))
 }