First method – If you have list of sites
1.Open Firefox.
2.Click tools and then select options…

» Read more: How to block images for specific website in Firefox 3.0
First method – If you have list of sites
1.Open Firefox.
2.Click tools and then select options…

» Read more: How to block images for specific website in Firefox 3.0
By default Firefox use Google.com in search engine bar , but you can change it your country domain or language ,and more easy your web surfing .

» Read more: How to change Google for specific country in Firefox 3 search engine bar
When you open Firefox 3,by default you found old google icon in search engine bar.
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But you can change into new look in easy way.
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» Read more: How to change Google icon in search engine bar in Firefox 3
When using Firefox, Sometimes you found this type error in your system “Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart you system.”
Follow these steps for run Firefox without restart your system.
1.Click Ok, in close Firefox massage box.
» Read more: How can Run not responding Firefox without restart system