diff --git a/lib/backend/adapter/gemini.js b/lib/backend/adapter/gemini.js
index 8a1c978..5b83eca 100644
--- a/lib/backend/adapter/gemini.js
+++ b/lib/backend/adapter/gemini.js
@@ -2,7 +2,7 @@ import { initBrowserBase } from '../../browser/launcher.js';
 import {
     sleep,
     safeClick,
-    pasteImages
+    uploadFilesViaChooser
 } from '../../browser/utils.js';
 import {
     fillPrompt,
@@ -58,23 +58,22 @@ async function generateImage(context, prompt, imgPaths, modelId, meta = {}) {
         await inputLocator.waitFor({ timeout: 30000 });
         await sleep(1500, 2500);
 
-        // 2. 上传图片
+        // 2. 上传图片 (使用 filechooser 事件，因为 Firefox 不会创建 DOM input 元素)
         if (imgPaths && imgPaths.length > 0) {
-            const expectedUploads = imgPaths.length;
-            let uploadedCount = 0;
+            // 点击加号按钮打开菜单
+            logger.debug('适配器', '点击加号按钮...', meta);
+            const uploadMenuBtn = page.getByRole('button', { name: 'Open upload file menu' });
+            await safeClick(page, uploadMenuBtn, { bias: 'button' });
+            await sleep(500, 1000);
 
-            await pasteImages(page, inputLocator, imgPaths, {
+            // 使用公共函数上传文件
+            const uploadFilesBtn = page.getByRole('button', { name: /Upload files/ });
+            await uploadFilesViaChooser(page, uploadFilesBtn, imgPaths, {
                 uploadValidator: (response) => {
                     const url = response.url();
-                    // 检测上传成功：google.com/upload/?upload_id= 的 POST 请求
-                    if (response.status() === 200 &&
+                    return response.status() === 200 &&
                         url.includes('google.com/upload/') &&
-                        url.includes('upload_id=')) {
-                        uploadedCount++;
-                        logger.info('适配器', `图片上传进度: ${uploadedCount}/${expectedUploads}`, meta);
-                        return uploadedCount >= expectedUploads;
-                    }
-                    return false;
+                        url.includes('upload_id=');
                 }
             });
 
diff --git a/lib/browser/utils.js b/lib/browser/utils.js
index 84de815..9e0dad4 100644
--- a/lib/browser/utils.js
+++ b/lib/browser/utils.js
@@ -404,6 +404,76 @@ export async function pasteImages(page, target, filePaths, options = {}) {
     }
 }
 
+/**
+ * 通过 filechooser 事件上传文件 (适用于无 DOM input 元素的场景，如 Firefox)
+ * @param {import('playwright-core').Page} page - Playwright 页面对象
+ * @param {string|import('playwright-core').ElementHandle|import('playwright-core').Locator} triggerTarget - 触发文件选择的按钮
+ * @param {string[]} filePaths - 文件路径数组
+ * @param {Object} [options] - 可选配置
+ * @param {Function} [options.uploadValidator] - 自定义上传确认回调函数, 接收 response 参数，返回 true 表示该响应代表一次成功上传
+ * @param {number} [options.timeout=60000] - 上传超时时间 (毫秒)
+ * @returns {Promise<void>}
+ */
+export async function uploadFilesViaChooser(page, triggerTarget, filePaths, options = {}) {
+    if (!filePaths || filePaths.length === 0) return;
+
+    const timeout = options.timeout || 60000;
+    const expectedUploads = filePaths.length;
+    let uploadedCount = 0;
+
+    logger.info('浏览器', `正在处理 ${filePaths.length} 张图片 (filechooser 模式)...`);
+
+    // 设置上传确认监听
+    const uploadPromise = new Promise((resolve) => {
+        if (!options.uploadValidator) {
+            // 无验证器，直接 resolve
+            resolve();
+            return;
+        }
+
+        const timeoutId = setTimeout(() => {
+            cleanup();
+            logger.warn('浏览器', `图片上传等待超时 (已确认: ${uploadedCount}/${expectedUploads})`);
+            resolve();
+        }, timeout);
+
+        const onResponse = (response) => {
+            if (options.uploadValidator(response)) {
+                uploadedCount++;
+                logger.info('浏览器', `图片上传进度: ${uploadedCount}/${expectedUploads}`);
+                if (uploadedCount >= expectedUploads) {
+                    cleanup();
+                    resolve();
+                }
+            }
+        };
+
+        const cleanup = () => {
+            clearTimeout(timeoutId);
+            page.off('response', onResponse);
+        };
+
+        page.on('response', onResponse);
+    });
+
+    // 设置等待 filechooser 事件（在点击之前）
+    const fileChooserPromise = page.waitForEvent('filechooser');
+
+    // 点击触发按钮
+    await safeClick(page, triggerTarget, { bias: 'button' });
+
+    // 等待 filechooser 事件并设置文件
+    const fileChooser = await fileChooserPromise;
+    await fileChooser.setFiles(filePaths);
+    logger.debug('浏览器', '已通过 filechooser 提交文件');
+
+    // 等待上传完成（如果有验证器）
+    if (options.uploadValidator) {
+        await uploadPromise;
+        logger.info('浏览器', '所有图片上传完成');
+    }
+}
+
 /**
  * 检查页面是否有效
  * @param {import('playwright-core').Page} page