diff --git a/src/app/service/service_worker/gm_api/gm_api.test.ts b/src/app/service/service_worker/gm_api/gm_api.test.ts
index 63b937997..f05fd6793 100644
--- a/src/app/service/service_worker/gm_api/gm_api.test.ts
+++ b/src/app/service/service_worker/gm_api/gm_api.test.ts
@@ -315,6 +315,18 @@ describe.concurrent("native GM_download 的 @connect 校验（verifyXhrConnect 
     expect((ret as ConfirmParam).permission).toBe("cors");
   });
 
+  it.concurrent("native 下载 data: URI 不发起网络请求，无需 @connect 也直接放行 (#1635)", async () => {
+    const url = `data:text/csv;charset=utf-8,${encodeURIComponent("a,b,c\n1,2,3")}`;
+    expect(await downloadConfirm(makeReq({ url, downloadMode: "native" }), makeConnSender(), makeGmApi())).toBe(true);
+    expect(
+      await downloadConfirm(
+        makeReq({ url, downloadMode: "native", connect: ["example.com"] }),
+        makeConnSender(),
+        makeGmApi()
+      )
+    ).toBe(true);
+  });
+
   it.concurrent("native 下载：域名命中 @connect 时放行", async () => {
     const req = makeReq({ url: "https://api.example.com/f.zip", downloadMode: "native", connect: ["example.com"] });
     const ret = await downloadConfirm(req, makeConnSender(), makeGmApi());
diff --git a/src/app/service/service_worker/gm_api/gm_api.ts b/src/app/service/service_worker/gm_api/gm_api.ts
index b2c91d5d0..a658951ed 100644
--- a/src/app/service/service_worker/gm_api/gm_api.ts
+++ b/src/app/service/service_worker/gm_api/gm_api.ts
@@ -1398,8 +1398,10 @@ export default class GMApi {
   @PermissionVerify.API({
     // native 下载会发起真实跨域请求，需校验黑名单 / 站点访问 / @connect。
     // 与 TM 不同（TM 的 @connect 只作用于 xhr/fetch），未列入 @connect 的域名改为弹窗询问由用户决定，而非直接拒绝。
+    // data: URI 内容自带、不发起网络请求，没有可校验的域名，直接放行 (#1635)
     confirm: async (request, sender, gmApi) => {
-      if (request.params[0]?.downloadMode !== "native") {
+      const details = request.params[0];
+      if (details?.downloadMode !== "native" || /^\s*data:/i.test(details.url)) {
         return true;
       }
       return gmApi.verifyXhrConnect(request, sender, true);