Browser Loader

on open location the_url
    tell application "System Events"
        set the_apps to the name of every process whose visible is true
        set browser_apps to {"Google Chrome", "FirefoxDeveloperEdition", "Safari"}
        repeat with the_app in browser_apps
            if the_app is in the_apps then
                my openURL(the_url, the_app)
                return
            end if
        end repeat
        my openURL(the_url, item 1 of browser_apps)
    end tell
end open location

on openURL(the_url, the_app)
    tell application the_app
        open location the_url
        activate
    end tell
end openURL