import re


with open('firefox_wp.txt', 'r', encoding='utf-8') as f:
    text = f.read()

pattern = r'Firefox \d{1,3} .+ released on \w{3,10} \d{1,2}, 20\d\d'
results = re.findall(pattern, text)

for i in results:
    s = re.split(r'[\.,]', i)
    ver = s[0].split()[1]
    date = ' '.join(s[0].split()[-2:]) + ',' + s[1]
    print(ver + '|' + date)