disconnection does not very but it works in internet explore

I disconnect code php that works very well when users click on logout page, but if the user clicks on the browser to go forward or to the background page does not expire. It still shows the previous login page. In fact, it expires when the user clicks on connect to expore internet pages

This has happened

Each time Firefox opened

Try announcement Web development / standards evangelism MozillaZine forum and provide this code here. The helpers there are better informed on the problems of development of web page with Firefox.
http://forums.mozillazine.org/viewforum.php?f=25
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Tags: Firefox

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