automation leech and downlaod with webdriver

leech.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import time, os, string
from selenium import webdriver
    
def downloader(link, host='http://shimory.com/'):
    file = open('/Users/jollychang/Downloads/firebug-1.7.3.xpi')
    fp = webdriver.FirefoxProfile()
    fp.add_extension(file)
    b = webdriver.Firefox(fp)
    l = link
    h = host
    b. get(h)
    print "clean the input box"
    b.find_element_by_id('url').clear()
    print "type download link"
    b.find_element_by_id('url').send_keys(l)
    print "submit form"
    #b.find_element_by_id('form').submit()
    print b.title
    b.find_element_by_tag_name('form').submit()
    print "submit form successfully"
    
    print b.title
    
    while not 'successfully' in b.page_source: 
        title = b.title
        print title.rsplit(" ")[0]
        if "The link you've requested has already finished before this." in b.page_source:
            print "The link you've requested has already finished before this."
            break
        time.sleep(1)
    dl = b.find_element_by_xpath("id('download-information')/p/a").get_attribute('href')
    b.quit()
    print dl
    dl = string.replace(dl, ' ', '%20')
    print dl
    os.system('wget %s -a log.log' % dl)

if __name__=='__main__':
    file = open('dl.txt')
    for link in file.readlines():
        downloader(link)
    file.close()
    print "file close"