diff --git a/src/background.thunderbird.js b/src/background.thunderbird.js
deleted file mode 100644
index ab0c5c0..0000000
--- a/src/background.thunderbird.js
+++ /dev/null
@@ -1,255 +0,0 @@
-/* global messenger */
-import browser from "webextension-polyfill";
-import {
-  MSG_FETCH,
-  MSG_GET_HTTPCACHE,
-  MSG_TRANS_TOGGLE,
-  MSG_OPEN_OPTIONS,
-  MSG_SAVE_RULE,
-  MSG_TRANS_TOGGLE_STYLE,
-  MSG_OPEN_TRANBOX,
-  MSG_CONTEXT_MENUS,
-  MSG_COMMAND_SHORTCUTS,
-  MSG_INJECT_JS,
-  MSG_INJECT_CSS,
-  MSG_UPDATE_CSP,
-  DEFAULT_CSPLIST,
-  CMD_TOGGLE_TRANSLATE,
-  CMD_TOGGLE_STYLE,
-  CMD_OPEN_OPTIONS,
-  CMD_OPEN_TRANBOX,
-} from "./config";
-import { getSettingWithDefault, tryInitDefaultData } from "./libs/storage";
-import { trySyncSettingAndRules } from "./libs/sync";
-import { fetchHandle, getHttpCache } from "./libs/fetch";
-import { sendTabMsg } from "./libs/msg";
-import { trySyncAllSubRules } from "./libs/subRules";
-import { tryClearCaches } from "./libs";
-import { saveRule } from "./libs/rules";
-import { getCurTabId } from "./libs/msg";
-import { injectInlineJs, injectInternalCss } from "./libs/injector";
-import { kissLog } from "./libs/log";
-
-globalThis.ContextType = "BACKGROUND";
-
-const REMOVE_HEADERS = [
-  `content-security-policy`,
-  `content-security-policy-report-only`,
-  `x-webkit-csp`,
-  `x-content-security-policy`,
-];
-
-/**
- * 添加右键菜单
- */
-async function addmenus(contextMenuType = 1) {
-  // 添加前先删除,避免重复ID的错误
-  try {
-    await browser.menus.removeAll();
-  } catch (err) {
-    //
-  }
-
-  switch (contextMenuType) {
-    case 1:
-      browser.menus.create({
-        id: CMD_TOGGLE_TRANSLATE,
-        title: browser.i18n.getMessage("app_name"),
-        contexts: ["page", "selection"],
-      });
-      break;
-    case 2:
-      browser.menus.create({
-        id: CMD_TOGGLE_TRANSLATE,
-        title: browser.i18n.getMessage("toggle_translate"),
-        contexts: ["page", "selection"],
-      });
-      browser.menus.create({
-        id: CMD_TOGGLE_STYLE,
-        title: browser.i18n.getMessage("toggle_style"),
-        contexts: ["page", "selection"],
-      });
-      browser.menus.create({
-        id: CMD_OPEN_TRANBOX,
-        title: browser.i18n.getMessage("open_tranbox"),
-        contexts: ["page", "selection"],
-      });
-      browser.menus.create({
-        id: "options_separator",
-        type: "separator",
-        contexts: ["page", "selection"],
-      });
-      browser.menus.create({
-        id: CMD_OPEN_OPTIONS,
-        title: browser.i18n.getMessage("open_options"),
-        contexts: ["page", "selection"],
-      });
-      break;
-    default:
-  }
-}
-
-/**
- * 更新CSP策略
- * @param {*} csplist
- */
-async function updateCspRules(csplist = DEFAULT_CSPLIST.join(",\n")) {
-  try {
-    const newRules = csplist
-      .split(/\n|,/)
-      .map((url) => url.trim())
-      .filter(Boolean)
-      .map((url, idx) => ({
-        id: idx + 1,
-        action: {
-          type: "modifyHeaders",
-          responseHeaders: REMOVE_HEADERS.map((header) => ({
-            operation: "remove",
-            header,
-          })),
-        },
-        condition: {
-          urlFilter: url,
-          resourceTypes: ["main_frame", "sub_frame"],
-        },
-      }));
-    const oldRules = await browser.declarativeNetRequest.getDynamicRules();
-    const oldRuleIds = oldRules.map((rule) => rule.id);
-    await browser.declarativeNetRequest.updateDynamicRules({
-      removeRuleIds: oldRuleIds,
-      addRules: newRules,
-    });
-  } catch (err) {
-    kissLog(err, "update csp rules");
-  }
-}
-
-/**
- * 插件安装
- */
-browser.runtime.onInstalled.addListener(() => {
-  tryInitDefaultData();
-
-  // 右键菜单
-  addmenus();
-
-  // 禁用CSP
-  updateCspRules();
-});
-
-/**
- * 浏览器启动
- */
-browser.runtime.onStartup.addListener(async () => {
-  // 同步数据
-  await trySyncSettingAndRules();
-
-  const { clearCache, contextMenuType, subrulesList, csplist } =
-    await getSettingWithDefault();
-
-  // 清除缓存
-  if (clearCache) {
-    tryClearCaches();
-  }
-
-  // 右键菜单
-  // firefox重启后菜单会消失,故重复添加
-  addmenus(contextMenuType);
-
-  // 禁用CSP
-  updateCspRules(csplist);
-
-  // 同步订阅规则
-  trySyncAllSubRules({ subrulesList });
-});
-
-/**
- * 监听消息
- */
-browser.runtime.onMessage.addListener(async ({ action, args }) => {
-  switch (action) {
-    case MSG_FETCH:
-      return await fetchHandle(args);
-    case MSG_GET_HTTPCACHE:
-      const { input, init } = args;
-      return await getHttpCache(input, init);
-    case MSG_OPEN_OPTIONS:
-      return await browser.runtime.openOptionsPage();
-    case MSG_SAVE_RULE:
-      return await saveRule(args);
-    case MSG_INJECT_JS:
-      return await browser.scripting.executeScript({
-        target: { tabId: await getCurTabId(), allFrames: true },
-        func: injectInlineJs,
-        args: [args],
-        world: "MAIN",
-      });
-    case MSG_INJECT_CSS:
-      return await browser.scripting.executeScript({
-        target: { tabId: await getCurTabId(), allFrames: true },
-        func: injectInternalCss,
-        args: [args],
-        world: "MAIN",
-      });
-    case MSG_UPDATE_CSP:
-      return await updateCspRules(args);
-    case MSG_CONTEXT_MENUS:
-      return await addmenus(args);
-    case MSG_COMMAND_SHORTCUTS:
-      return await browser.commands.getAll();
-    default:
-      throw new Error(`message action is unavailable: ${action}`);
-  }
-});
-
-/**
- * 监听快捷键
- */
-browser.commands.onCommand.addListener((command) => {
-  // console.log(`Command: ${command}`);
-  switch (command) {
-    case CMD_TOGGLE_TRANSLATE:
-      sendTabMsg(MSG_TRANS_TOGGLE);
-      break;
-    case CMD_OPEN_TRANBOX:
-      sendTabMsg(MSG_OPEN_TRANBOX);
-      break;
-    case CMD_TOGGLE_STYLE:
-      sendTabMsg(MSG_TRANS_TOGGLE_STYLE);
-      break;
-    case CMD_OPEN_OPTIONS:
-      browser.runtime.openOptionsPage();
-      break;
-    default:
-  }
-});
-
-/**
- * 监听右键菜单
- */
-browser.menus.onClicked.addListener(({ menuItemId }) => {
-  switch (menuItemId) {
-    case CMD_TOGGLE_TRANSLATE:
-      sendTabMsg(MSG_TRANS_TOGGLE);
-      break;
-    case CMD_TOGGLE_STYLE:
-      sendTabMsg(MSG_TRANS_TOGGLE_STYLE);
-      break;
-    case CMD_OPEN_TRANBOX:
-      sendTabMsg(MSG_OPEN_TRANBOX);
-      break;
-    case CMD_OPEN_OPTIONS:
-      browser.runtime.openOptionsPage();
-      break;
-    default:
-  }
-});
-/**
- * 邮件显示中注册脚本
- */
-async function registerMsgDisplayScript() {
-		await messenger.messageDisplayScripts.register({
-			js: [{file: "/content.js"}]
-		});
-	}
-registerMsgDisplayScript();