diff --git a/src/util/pattern.ts b/src/util/pattern.ts
index ea3910ad..465bc4bb 100644
--- a/src/util/pattern.ts
+++ b/src/util/pattern.ts
@@ -74,9 +74,13 @@ export type HostInfo = {
 }
 
 export function extractHostname(url: string): HostInfo {
+    let fileHost = extractFileHost(url)
+    if (fileHost) {
+        return { host: fileHost, protocol: 'file' }
+    }
+
     let host: string
     let protocol: string
-
     const indexOfDoubleSlashes = url.indexOf("//")
     if (indexOfDoubleSlashes > -1) {
         const splits = url.split('/')
diff --git a/test/util/pattern.test.ts b/test/util/pattern.test.ts
index 64bc57df..a9399793 100644
--- a/test/util/pattern.test.ts
+++ b/test/util/pattern.test.ts
@@ -47,7 +47,7 @@ test("url", () => {
     expect(extractHostname('localhost:8087/?123=123')).toEqual({ host: 'localhost:8087', protocol: '' })
     // the url of local files in firefox
     expect(extractHostname("file:///home/zhy/%E4%B8%8B%E8%BD%BD/%E6%88%91%E7%9A%84%E4%B8%8A%E7%BD%91%E6%97%B6%E9%97%B4_20220305_20220305.json"))
-        .toEqual({ host: "", protocol: "file" })
+        .toEqual({ host: JSON_HOST, protocol: "file" })
 })
 
 test("homepage", () => {