Great idea! That would allow all the emails related to a task to be easily found. I would like the ability to put email bids/discussions from several vendors with the task to buy the product or service.
I keep a lot of tabs open in multiple windows, and when Firefox update requires an update in the middle of a (non-private) session, it can take several minutes to come back. Often I am trying to open a new page, and that process is lost. Other time...