All modern browser remember the websites you have visited. This is to give you the customized user experience. But it also a source of privacy concern for a user, specially if you are using your browser from a public computer or which can be accessed by others.
A typical example is that if you are fond of watching porn on your home computer, and want that to avoid it to be known to your better half, who can always search your browsing history in your absense.
No, I am not promoting such a behavior from you, but everybody has the right to choose his way of living. And so here is a solution for blocking the selected websites (hosts) completely from going into your browser history.
There are other options also available, if you want to browse internet anonymously, but HitoryBlock allows you to retain all your hisory and block only the sites you choose from going into your history, with just a click of your mouse.

Download and install HitoryBlock. After that, whenever you are on a website you want to delete from your browser history, just right click anywhere on the page and select Blog History; all the pages of that website will get deleted from your Firefox History.
Alternatively, you can also add selected websites from the Firefox Menu.
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Firefox Security Addons Series
Others Posts in the Series Include...
- How To Ensure Privacy While Using Search Engines
- Safe Browsing-Change Proxy Settings to Access Blocked Websites
- Disable JavaScript, Flash for Secured Web Browsing with NoScript
- Scan Links and Online Files with Dr.Web Antivirus Link Checker
- Firefox Private Browsing - Close 'n' Forget
- Anonymous Internet Browsing with Private Browsing Firefox Addon
- Ghostery - Know Who is Tracking You [Firefox Privacy]
- Safe Internet Browsing with WOT
- TrashMail.net | Free Disposable Email Address [Firefox Security Addon]
- HistoryBlock | Delete Selected Websites from Browser History [Firefox Security Addon]
- KeyScrambler - Free Anti Keylogger Software [Firefox Security Addon]
- Prevent Malware and Phishing with Long URL Please [Firefox Security Addon]
- Phishing Detection and Prevention with FormFox [Firefox Security Addon]

