diff --git a/package.json b/package.json
index a997831..d862f62 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,11 @@
     "extends": [
       "react-app",
       "react-app/jest"
-    ]
+    ],
+    "globals": {
+      "GM": true,
+      "unsafeWindow": true
+    }
   },
   "browserslist": {
     "production": [
diff --git a/src/libs/fetch.js b/src/libs/fetch.js
index e2a4f62..4325720 100644
--- a/src/libs/fetch.js
+++ b/src/libs/fetch.js
@@ -21,31 +21,27 @@ import { msAuth } from "./auth";
  */
 const fetchGM = async (input, { method = "GET", headers, body } = {}) =>
   new Promise((resolve, reject) => {
-    try {
-      (window.GM_xmlhttpRequest || window.GM.xmlhttpRequest)({
-        method,
-        url: input,
-        headers,
-        data: body,
-        onload: (response) => {
-          if (response.status === 200) {
-            const headers = new Headers();
-            response.responseHeaders.split("\n").forEach((line) => {
-              let [name, value] = line.split(":").map((item) => item.trim());
-              if (name && value) {
-                headers.append(name, value);
-              }
-            });
-            resolve(new Response(response.response, { headers }));
-          } else {
-            reject(new Error(`[${response.status}] ${response.responseText}`));
-          }
-        },
-        onerror: reject,
-      });
-    } catch (error) {
-      reject(error);
-    }
+    GM.xmlHttpRequest({
+      method,
+      url: input,
+      headers,
+      data: body,
+      onload: (response) => {
+        if (response.status === 200) {
+          const headers = new Headers();
+          response.responseHeaders.split("\n").forEach((line) => {
+            const [name, value] = line.split(":").map((item) => item.trim());
+            if (name && value) {
+              headers.append(name, value);
+            }
+          });
+          resolve(new Response(response.response, { headers }));
+        } else {
+          reject(new Error(`[${response.status}] ${response.responseText}`));
+        }
+      },
+      onerror: reject,
+    });
   });
 
 /**
diff --git a/src/libs/storage.js b/src/libs/storage.js
index 974eec6..ecf9030 100644
--- a/src/libs/storage.js
+++ b/src/libs/storage.js
@@ -4,8 +4,8 @@ async function set(key, val) {
   if (isExt) {
     await browser.storage.local.set({ [key]: val });
   } else if (isGm) {
-    const oldValue = await (window.GM_getValue || window.GM.getValue)(key);
-    await (window.GM_setValue || window.GM.setValue)(key, val);
+    const oldValue = await GM.getValue(key);
+    await GM.setValue(key, val);
     window.dispatchEvent(
       new StorageEvent("storage", {
         key,
@@ -31,7 +31,7 @@ async function get(key) {
     const val = await browser.storage.local.get([key]);
     return val[key];
   } else if (isGm) {
-    const val = await (window.GM_getValue || window.GM.getValue)(key);
+    const val = await GM.getValue(key);
     return val;
   }
   return window.localStorage.getItem(key);
@@ -41,8 +41,8 @@ async function del(key) {
   if (isExt) {
     await browser.storage.local.remove([key]);
   } else if (isGm) {
-    const oldValue = await (window.GM_getValue || window.GM.getValue)(key);
-    await (window.GM_deleteValue || window.GM.deleteValue)(key);
+    const oldValue = await GM.getValue(key);
+    await GM.deleteValue(key);
     window.dispatchEvent(
       new StorageEvent("storage", {
         key,
diff --git a/src/userscript.js b/src/userscript.js
index e4bc71a..978ead4 100644
--- a/src/userscript.js
+++ b/src/userscript.js
@@ -16,12 +16,8 @@ import { Translator } from "./libs/translator";
     document.location.href.includes(process.env.REACT_APP_OPTIONSPAGE) ||
     document.location.href.includes(process.env.REACT_APP_OPTIONSPAGE2)
   ) {
-    window.unsafeWindow.GM = window.GM;
-    window.unsafeWindow.GM_xmlhttpRequest = window.GM_xmlhttpRequest;
-    window.unsafeWindow.GM_setValue = window.GM_setValue;
-    window.unsafeWindow.GM_getValue = window.GM_getValue;
-    window.unsafeWindow.GM_deleteValue = window.GM_deleteValue;
-    window.unsafeWindow.APP_NAME = process.env.REACT_APP_NAME;
+    unsafeWindow.GM = GM;
+    unsafeWindow.APP_NAME = process.env.REACT_APP_NAME;
     return;
   }