What is a cookie ?

A cookie is a file created by a website and stored on your computer that contains certain information such as your preferences on this website. When you visit a site that uses cookies , the site asks permission to Firefox to save one or more cookies on your hard drive.

Then when you return to the same place , Firefox returns that previously had saved cookies . This page allows you to view custom tailored to your preferences.

Cookies may also contain information to identify you , such as your name, email address, postal address, or telephone number . However , you must bear in mind that any website has only information that you give yourself . For example, a website can not get your e-mail address unless you provide the same (eg the type into a form ). The website does not have access to any other information stored on your computer.

In the default configuration , although this mechanism is invisible to the user , and you will not know if a website creates a cookie or if Firefox returns a cookie to the web site to which it belongs. However, you can configure Firefox to prompt you to accept each cookie.

Establish rules for cookies

By default Firefox accepts all cookies . If you want more control over the cookies that are stored on your computer, follow these instructions:

Select Tools > Options and open the Privacy box.
Select to close Firefox from the Keep until menu.

If you want to give to the places you trust the ability to store cookies permanently (eg , allowing a log automatically ) , click [ cookies_exceptions # Exceptions ... ], enter the site address , and click Allow.

Parameters cookies

There are other options that affect the management of cookies in Firefox.

Accept cookies from sites:

If you do not want to store any cookies on your computer, uncheck this option. Note that some websites may not work well if you have cookies disabled. If you want to grant some sites the ability to store cookies , open the [ # cookies_exceptions window cookie exceptions ] ... clicking Exceptions , enter the site address and click Allow or Allow for session.

Keep until :


If this option is selected will delete the cookie information when it reaches its expiration date .
If this option is selected , the information in the cookie is deleted when you restart Firefox. Websites that require the use of cookies will still work , but if you restart Firefox , the website believe that you walk again for the first time.

ask me every time
Display a warning each time a site tries to store a cookie, to ask you if you want to store.

Accept cookies and block

If you have chosen to ask me every time Keep until menu , you'll see a dialog with the following options when a site tries to store a cookie on your computer :

Allow: To accept this cookie in particular , just click Allow. Use this option if you trust the site.

Allow for this session : If you want to allow cookies for the current session , but it deleted when you exit Firefox, click Allow for this session. Use this if the site does not work without cookies but do not want their cookies are stored permanently .

Deny: If you want to store the cookie , then click Deny . Use it if you do not trust the site or suspect may compromise your privacy.

Use my choice for all cookies from this site: Select this check box before clicking any buttons if you want Firefox to remember your decision and do not ask again . The site added to the window [ # cookies_exceptions cookie exceptions ] , where you can modify your choice anytime later.

Exceptions Window Cookies

Access this window by clicking the button Exceptions ... Cookies options . Here you can define exceptions to your general options for specific places cookies . Using exceptions, you can allow all cookies , reject all , or allow them to delete them but when you exit Firefox, regardless of other options that you have defined.

To add a site to the list , simply enter the domain name of the site address field of the website. Then click Ignore to reject cookies the site, click Allow to allow them or click Allow for this session to allow them from this place but remove them when you exit Firefox.

To remove a site from the list , select it and click Remove Site . To completely clear the entire list , click Remove All Sites . This will remove all the established rules and apply general settings for cookies.

Internet Explorer

To delete cookies in Internet Explorer

Open Internet Explorer.

Click the Tools button, point to Safety, and then click Delete Browsing History.

Select the Cookies check box, and then press Delete.

To block or allow cookies

Open Internet Explorer.

Click the Tools button, and then click Internet Options.

Click the Privacy tab, and then click Settings, move the slider to the top to block all cookies or totally down to allow all cookies, and then click OK.

Blocking cookies may prevent certain pages to display correctly.

Google Chrome

By default, all cookies are disabled, but you can change this setting. If you have defined or blocked cookies on the page that displays an icon at the end of the address bar appears.

As cookies and data permissions are set sites

1 - Click theChromemenu on thebrowsertoolbar.

2 -SelectSettings.
3 -Click onShowadvanced settings.
4 -In the Privacysection, click theSettings buttoncontent.
5-In the Cookiessection, you can changesettingsfollowingcookies:

Deleting cookies :
Click All cookies and site data to open the dialog box cookies and other data.
To delete all cookies , click Remove all at the bottom of the dialog box .
To delete a specific cookie , you move the cursor on the site that has issued the cookie and then click the X that appears on the far right.

You can also remove all cookies created during a specific period , through dialog , "How are cleared browsing data."

If you want Google Chrome to automatically delete cookies when you close all browser windows , check the checkbox preserves local data until you exit the browser Settings dialog content. You can also create exceptions to be deleted cookies from a particular place as soon as you close the browser.

Blocking cookies by default :

Blocking all cookies:
Block sites selected data set . Note that selecting this setting will prevent that work most places require that you sign .

You will see theicon inthe address bareach time acookieis blocked.

Block third-party cookies only:
check the checkbox "Block third-party cookies and given the site" . Although a site has been added to the list of exceptions of your choice that cookies are allowed, if this checkbox is checked, third party cookies are not acceptaran site.

Admission of cookies by default:
Assegurese Sets the local data option is selected for both internal and third-party cookies are supported. If you only want to accept cookies internes , check the checkbox " Block all third-party cookies without exception."

Because cookies and site data are preserved by default until you exit the browser:

Chrome will allow locals conserve sites data, including internal and third-party cookies, and deleted when you exit the browser or close it.

Certain cookies and other data associated with hosted applications can not be erased by Content Settings.

Defining exceptions for cookies from specific websites or domains:

To control how cookies should treat some sites or domains , click Manage exceptions. To add a rule to the Cookies dialog box i data exceptions listed sites , estors follow steps:

1 - Press the field " Add a new exception pattern " and enter the name of the domain for which you want to create the exception.
To create exceptions for an entire domain , insert [*. ] Before the domain name ( for example, [*. ] . Thus will be included ).
You can also specify an IP address, an IPv6 address or a URL that is not http.
2 - Use the menu to choose whether the site can set cookies. If you select Delete to close the cookies shall be deleted each time you close the browser.
You can also edit or remove exceptions by this dialog box .

Viewing cookie information to the page you are visiting :
Icons may appear in the address bar to warn that have blocked or set cookies:

The iconblockedcookies appearswhenever acookieis blocked on thepage you visit,although hehas admittedall local databy default, asyou createexceptionsfor specific domains.
Iconcookies enabled appears whenever the páginavisitada cookies are set, but have blocked all cookies by default , as you create exceptions for specific domains .

To view the cookies that have been defined or have been locked, you must only click on the icon and then click Show details and site cookies . Then you can create the following exceptions:

Back to block cookies enabled: on cookies enabled tab , select the site from the list at the top and click on Block . These domains will be added to the list of exceptions.

Allows cookies from a domain: the tab for blocked Cookies, select the site from the list at the top and click on Allow. These domains will be added to the list of exceptions.

If you select "Continue where I left off " boot option of the browser, the session cookies will be stored when you leave. This will keep your started on a site , such as Gmail session.

Allows cookies from a domain until you log off or close Chrome: Blocked on Cookies tab , select the site from the list at the top and click Delete to close . Cookies shall be deleted each time you close the browser.

You may have to refresh the page for the changes to take effect. Although you have chosen to allow cookies from a site, the third party cookies are not marked acceptaran if the checkbox " Block all third-party cookies without exception."