diff --git a/src/background/apis/chatgpt-web.mjs b/src/background/apis/chatgpt-web.mjs
index 0d4de34..ffaee9a 100644
--- a/src/background/apis/chatgpt-web.mjs
+++ b/src/background/apis/chatgpt-web.mjs
@@ -53,13 +53,24 @@ export async function generateAnswersWithChatgptWebApi(port, question, session,
   }
 
   const controller = new AbortController()
+  const stopListener = (msg) => {
+    if (msg.stop) {
+      console.debug('stop generating')
+      port.postMessage({ done: true })
+      controller.abort()
+      port.onMessage.removeListener(stopListener)
+    }
+  }
+  port.onMessage.addListener(stopListener)
   port.onDisconnect.addListener(() => {
     console.debug('port disconnected')
     controller.abort()
     deleteConversation()
   })
 
-  const models = await getModels(accessToken).catch(() => {})
+  const models = await getModels(accessToken).catch(() => {
+    port.onMessage.removeListener(stopListener)
+  })
   const config = await getUserConfig()
 
   let answer = ''
@@ -112,8 +123,12 @@ export async function generateAnswersWithChatgptWebApi(port, question, session,
     async onStart() {
       // sendModerations(accessToken, question, session.conversationId, session.messageId)
     },
-    async onEnd() {},
+    async onEnd() {
+      port.onMessage.removeListener(stopListener)
+    },
     async onError(resp) {
+      if (resp instanceof Error) throw resp
+      port.onMessage.removeListener(stopListener)
       if (resp.status === 403) {
         throw new Error('CLOUDFLARE')
       }
diff --git a/src/background/apis/openai-api.mjs b/src/background/apis/openai-api.mjs
index 1aa5fdc..409cb52 100644
--- a/src/background/apis/openai-api.mjs
+++ b/src/background/apis/openai-api.mjs
@@ -35,6 +35,15 @@ export async function generateAnswersWithGptCompletionApi(
   modelName,
 ) {
   const controller = new AbortController()
+  const stopListener = (msg) => {
+    if (msg.stop) {
+      console.debug('stop generating')
+      port.postMessage({ done: true })
+      controller.abort()
+      port.onMessage.removeListener(stopListener)
+    }
+  }
+  port.onMessage.addListener(stopListener)
   port.onDisconnect.addListener(() => {
     console.debug('port disconnected')
     controller.abort()
@@ -79,8 +88,12 @@ export async function generateAnswersWithGptCompletionApi(
       port.postMessage({ answer: answer, done: false, session: null })
     },
     async onStart() {},
-    async onEnd() {},
+    async onEnd() {
+      port.onMessage.removeListener(stopListener)
+    },
     async onError(resp) {
+      if (resp instanceof Error) throw resp
+      port.onMessage.removeListener(stopListener)
       if (resp.status === 403) {
         throw new Error('CLOUDFLARE')
       }
@@ -99,6 +112,15 @@ export async function generateAnswersWithGptCompletionApi(
  */
 export async function generateAnswersWithChatgptApi(port, question, session, apiKey, modelName) {
   const controller = new AbortController()
+  const stopListener = (msg) => {
+    if (msg.stop) {
+      console.debug('stop generating')
+      port.postMessage({ done: true })
+      controller.abort()
+      port.onMessage.removeListener(stopListener)
+    }
+  }
+  port.onMessage.addListener(stopListener)
   port.onDisconnect.addListener(() => {
     console.debug('port disconnected')
     controller.abort()
@@ -142,8 +164,12 @@ export async function generateAnswersWithChatgptApi(port, question, session, api
       port.postMessage({ answer: answer, done: false, session: null })
     },
     async onStart() {},
-    async onEnd() {},
+    async onEnd() {
+      port.onMessage.removeListener(stopListener)
+    },
     async onError(resp) {
+      if (resp instanceof Error) throw resp
+      port.onMessage.removeListener(stopListener)
       if (resp.status === 403) {
         throw new Error('CLOUDFLARE')
       }
diff --git a/src/background/index.mjs b/src/background/index.mjs
index 8574be8..bcc8c9d 100644
--- a/src/background/index.mjs
+++ b/src/background/index.mjs
@@ -51,8 +51,9 @@ Browser.runtime.onConnect.addListener((port) => {
   console.debug('connected')
   port.onMessage.addListener(async (msg) => {
     console.debug('received msg', msg)
-    const config = await getUserConfig()
     const session = msg.session
+    if (!session) return
+    const config = await getUserConfig()
     if (session.useApiKey == null) {
       session.useApiKey = isUsingApiKey(config)
     }
@@ -84,8 +85,10 @@ Browser.runtime.onConnect.addListener((port) => {
       }
     } catch (err) {
       console.error(err)
-      port.postMessage({ error: err.message })
-      cache.delete(KEY_ACCESS_TOKEN)
+      if (!err.message.includes('aborted')) {
+        port.postMessage({ error: err.message })
+        cache.delete(KEY_ACCESS_TOKEN)
+      }
     }
   })
 })
diff --git a/src/components/ConversationCard/index.jsx b/src/components/ConversationCard/index.jsx
index 7adf2fc..ab31c11 100644
--- a/src/components/ConversationCard/index.jsx
+++ b/src/components/ConversationCard/index.jsx
@@ -223,6 +223,7 @@ function ConversationCard(props) {
             type={data.type}
             session={data.session}
             done={data.done}
+            port={port}
           />
         ))}
       </div>
diff --git a/src/components/ConversationItem/index.jsx b/src/components/ConversationItem/index.jsx
index 0682d14..5896bd4 100644
--- a/src/components/ConversationItem/index.jsx
+++ b/src/components/ConversationItem/index.jsx
@@ -5,7 +5,7 @@ import CopyButton from '../CopyButton'
 import PropTypes from 'prop-types'
 import MarkdownRender from '../MarkdownRender/markdown.jsx'
 
-export function ConversationItem({ type, content, session, done }) {
+export function ConversationItem({ type, content, session, done, port }) {
   const [collapsed, setCollapsed] = useState(false)
 
   switch (type) {
@@ -36,6 +36,17 @@ export function ConversationItem({ type, content, session, done }) {
           <div className="gpt-header">
             <p>{session ? 'ChatGPT:' : 'Loading...'}</p>
             <div style="display: flex; gap: 15px;">
+              {!done && (
+                <button
+                  type="button"
+                  className="normal-button"
+                  onClick={() => {
+                    port.postMessage({ stop: true })
+                  }}
+                >
+                  Stop
+                </button>
+              )}
               {done && session && session.conversationId && (
                 <FeedbackForChatGPTWeb
                   messageId={session.messageId}
@@ -97,6 +108,7 @@ ConversationItem.propTypes = {
   content: PropTypes.string.isRequired,
   session: PropTypes.object.isRequired,
   done: PropTypes.bool.isRequired,
+  port: PropTypes.object.isRequired,
 }
 
 export default ConversationItem
diff --git a/src/content-script/styles.scss b/src/content-script/styles.scss
index fff87b5..29bd251 100644
--- a/src/content-script/styles.scss
+++ b/src/content-script/styles.scss
@@ -167,6 +167,15 @@
     .gpt-util-icon {
       cursor: pointer;
     }
+
+    .normal-button {
+      border: 1px solid;
+      border-color: var(--theme-border-color);
+      background-color: var(--theme-color);
+      color: var(--font-color);
+      border-radius: 5px;
+      cursor: pointer;
+    }
   }
 
   .error {
diff --git a/src/utils/fetch-sse.mjs b/src/utils/fetch-sse.mjs
index b9b4085..dec7109 100644
--- a/src/utils/fetch-sse.mjs
+++ b/src/utils/fetch-sse.mjs
@@ -3,9 +3,13 @@ import { streamAsyncIterable } from './stream-async-iterable'
 
 export async function fetchSSE(resource, options) {
   const { onMessage, onStart, onEnd, onError, ...fetchOptions } = options
-  const resp = await fetch(resource, fetchOptions)
+  const resp = await fetch(resource, fetchOptions).catch(async (err) => {
+    await onError(err)
+  })
+  if (!resp) return
   if (!resp.ok) {
     await onError(resp)
+    return
   }
   const parser = createParser((event) => {
     if (event.type === 'event') {