có hoặc không có sử dụng biểu tượng nhỏ, Firefox cho biết thêm chỉ là một chút quá nhiều khoảng cách, mà bloats thanh công tùy chỉnh thanh công cụ của bạn, bạn nhấn phải chuột vào thanh công cụ và chọn Customize từ menu lần nữa, để áp dụng ví dụ này, nhập vào sau đây trong | 110 Part II Hacking Performance Security and Banner Ads Reviewing Stored Cookies and Removing Them If you wish to find out what cookies are stored on your computer or remove some cookies click on the View Cookies button shown in Figure 6-11 . That opens the Stored Cookies window shown in Figure 6-12. Figure 6-12 The Stored Cookies window. Selecting a cookie from the list at the top displays its information in the lower pane. To remove a single cookie highlight it and click the Remove Cookie button. To remove all cookies click the Remove All Cookies button. To prevent a removed cookie from coming back make sure to check the box beside Don t allow sites that set removed cookies to set future cookies. Preemptively Blocking Known Undesirable Cookies What if you know that you don t ever want to receive cookies from a specific site Firefox has the ability to preemptively block any cookies in a list. Click the Exceptions button shown in Figure 6-11 . In the Exceptions window you can list what sites are always or never allowed to store cookies. Figure 6-13 shows the Exceptions window. Simply type the address of the website in the text box at the top and then click the Block button. From now on Firefox will never allow that website to store a cookie on your computer. If you already have cookies stored from that site you will have to remove them using the Stored Cookies window shown in Figure 6-12. Chapter 6 Hacking Security and Privacy 111 Figure 6-13 The Cookie Exceptions window Using the Mozilla Update Service The Mozilla Update service allows you to update the extensions and themes installed as well as the Firefox program itself. The easiest way to use the update service is to select Advanced from the list on the left of the Options window click Software Update and then click the Check Now button as shown in Figure 6-14. Figure 6-14 Advanced settings for updating software 112 Part II Hacking Performance Security and Banner Ads After you click the Check Now button Firefox
