Mozilla Thunderbird + 4 pro (Slow speed) Home › Surface Pro 4 › Mozilla Thunderbird + 4 pro (Slow speed) This topic contains 0 replies, has 1 voice, and was last updated by Jose Sennacheribbo 3 months, 3 weeks ago. Author Posts May 25, 2017 at 12:58 pm #2694 Jose SennacheribboParticipant I have a Pro-4 and I’m using Mozilla Thunderbird as e-mail program. 5 accounts (4 IMAP + 1 pop). the computer is Very,very Slow (and is not a matter of Internet speed as at home I have 300Mb and still works Slow). Any Idea? Author Posts You must be logged in to reply to this topic.