Rated 5 out of 5 stars
I had to install thunderbird on a new pc and looking for old e-mail address was a real drag (looking for old e-mails, then copy and paste the mail address before i could send it). I desperatly needed to have auto-complete old addresses on. I just installed the add-on. Was a bit skeptic due to other reviews. I had all addresses in under a minute on four e-mail accounts. Just Brilliant !!!! Thank you very much for this add-on. Would give 6 starts if it was possible.