i also have a problem to setup TB , i can't solve this problem because mu Laptop.. first this firefox apps must trough itu Windows , can't i setup this problem with my mac OSX , hmmm .but my Mac sistem have google Chrome , i install from i-tuned with my old Apple id.. i can't open again this acc. i have this big problem for along time.

jonan4 said

The folders in Yahoo are there to save incoming mail and can be listed by names or businesses or events.

To synchronize all the folders, set up the Yahoo account as IMAP:

https://support.mozilla.org/en-US/questions/1122653