From the startup time to searching to drafting/sending a message, the UI feels comparatively slow relative to using Gmail.
One idea is to have a 'slim' draft message option; the idea being if I have Thunderbird set as my default email client and I cl...
The colors in Gmail are useful for distinguishing the different labels at a glance.
However, the user-created labels in Thunderbird are all the same yellow-ish color.
To make transitioning from Gmail to Thunderbird, more natural, these could match.