本人在上星期將Firefox升級為3.5.2最新版本，一直沒有甚問題出現過，但在這一兩日就出了一個嚴重問題，就是在進入論壇、電郵等進行登錄時，竟不能登錄，當一填上名稱及密碼啟後，雖會出現謝謝回來等字句，但一轉話面就發現沒有登錄，不論是論壇、電郵等，完全不能登錄，也試過自動填表，手動操作情況也是一樣，有沒有人可說給我知有甚麼問題，如何解決、會不會與本人所安裝插件有關?下方是本人的Firefox所安裝的插件，
如有答案請通知本人，本人E-mail：fuwing75@gmail.com謝謝幫忙。

1.All-in-OneSidebar{0.7.10}.xpi -- Sidebar control with award-winning user experience!
2.AnyColor{0.3.0}.xpi-- A dynamic theme that lets you customize it's appearance on the fly.
3.Basics{3.5}.xpi -- Anchors the new tab button on the left side tab bar.
4.DownThemAll{1.1.4}.xpi -- The mass downloader for Firefox.
5.DownloadHelper{4.6}.xpi -- Download videos and images from many sites
6.FEBE{6.2}.xpi -- Backup your Firefox data
7.FirefoxShowcase{0.9.5}.xpi -- Easily locate any browser you've opened in Firefox
8.Firesizer{0.92}.xpi -- Provides a menu and status bar to resize the window outer dimensions to a specific size
9.FoxLingo{2.4.2}.xpi -- The Ultimate Language Tool!
10.GmailManager{0.5.7.3}.xpi -- Gmail accounts management and new mail notifications.
11.IETab{1.5.20090525}.xpi -- Enables you to use the embedded IE engine within Mozilla/Firefox.
12.Microsoft.NETFrameworkAssistant{1.1}.xpi -- Adds ClickOnce support and the ability to report installed .NET versions to the web server.
13.MultipleTabHandler{0.4.2009073101}.xpi -- Provides feature to close multiple tabs.
14.NewTabURL{1.6.2}.xpi -- Select default URL when new tabs are opened.
15.NewTongWenTang{0.3.9.8.3}.xpi -- 中文繁簡轉換 (Chinese Simplified<->Traditional switcher)
16.TabGroupsManager{2009.06.19.01}.xpi -- "TabGroups Manager" helps the management of the tab by dividing the tab into the groups.
17.TabKit{0.5.6}.xpi -- Tab grouping, multi-rows, tree view, and other tweaks.
18.TabScope{0.2.2.11}.xpi -- Preview and navigate tab contents through popup.
19.UltraSurfFirefoxTool{2.0}.xpi -- (none)
20.UpdateNotifier{0.1.5.5}.xpi -- Notifies you when updates are available for your extensions and themes.
21.iMacrosforFirefox{6.2.4.0}.xpi

進入的是Mozilla Taiwan這裡嗎?((不是的話請提供網址供參考))

檢查一下你的cookie，把跟同一個論壇的cookie都先刪除看看。

方法：工具→選項...→個人隱私→顯示cookie→從搜尋中找moztw((或者無法登入的論壇網址的一部份))→全部反白後按「刪除cookie」。