In order to uninstall Babylon and all is features completely ,follow the 4 steps below :
1) Uninstall Babylon Software:
http://support.babylon.com/index.php?/Knowledgebase/Article/View/177/0/uninstall-babylon-software
2) Change Babylon Home Page (Internet Explorer \ Firefox \ Google Chrome):
http://support.babylon.com/index.php?/Knowledgebase/Article/View/175/0/change-babylon-home-page
3) Remove Babylon search provider
http://support.babylon.com/index.php?/Knowledgebase/Article/View/174/0/change--babylon-search-engine
4) Uninstall Babylon Toolbar Software
http://support.babylon.com/index.php?/Knowledgebase/Article/View/213/0/uninstall-babylon-toolbar-software
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Tab Issue IE
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In order to stop this new tab issue, please do as follows:
Open your Internet Explorer browser, click on "Tools", then "Internet Options" and in the section "Tabs" click on "Settings". It will open a new window, on the option "When a new tab is opened, open:" in the drop-down menu please choose "Your first homepage". Then click OK, Apply and OK.
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Tab Issue Firefox
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Go to the "Tools" menu and select "Add-ons". It will open a popup. Click in the "Extensions" tab. Look for the "Babylon Search" extension. Click the "Uninstall" button. Then close and reload Firefox.
To remove the search new tab in Firefox please use the following steps:
• In the address bar write : about:config
• remove the babylon “search.babylon.com” from the |keyword.URL”
• change the search.babylon.com to any of the search provider you want example : ( www.google.com )
• remove the babylon “search.babylon.com” from the |extensions.babylontoolbar.newtaburl”
• change the search.babylon.com to any of the search provider you want example : ( www.google.com )
Here is another help topic on the subject: http://forum.gtricks.com/discussion/151/how-can-i-uninstall-the-babylon-search-from-chrome/p1