In Mail and other apps, on my Mac Book Pro, as well as my iPad, I set up and can use text shortcuts such as typing 'in2' and it expanding to 'I'll be there in 2'. It even works in Outlook for Mac, which I really don't care for. Why doesn't it work for Thunderbird? I really like the look and feel of Thunderbird, but this is a deal breaker for me. I use a lot of repetitive phrases.

Thank you.