Currently in Thunderbird for Android, the list of folders in any given account is auto-collapsed to top-level folder such as "Inbox", with all subfolders hidden at the start. Also, under the top-level folders, only two layers of nesting is allowed e.g. "Inbox>01-Folder>A-Subfolder" are shown as folders nested within one another, but if "A-Subfolder" contained sub-folders itself, they are shown as "A-Subfolder/SubSub1" and "A-Subfolder/SubSub2" instead of being nested Improving the startup behavior to enable customizing which folders are auto-expanded or to remember the expanded folder list, and making the nesting go deeper that it is right now, would greatly improve the user's experience for those of us who use folders extensively.
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