After installing, check the browser option and you will find out all the available browsers in the gallery. Pick the preferred one out of all the available browsers and check the “use by default for this action”.
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To change the default browser in Android, you must go to the "Settings" -> "Applications" -> "Manage applications", find and select the application you want to set as your default browser.
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In the properties of the application click on "Remove the default settings." Then, you will see a dialog box containing the downloaded and pre-existed programs from which you can set your default browser. This manual approach is generally to change the association of any files in Android.
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