How do I stop collapsed threads from expanding when I return to a mail folder?
One of the most important uses of threading is to significantly reduce the number of line items in a folder. But for some reason Thunderbird is set up to defeat that goal, leaving us with an unnecessarily long list. I can find no description of how to reverse this impractical default of expanding all threads every time I reopen a folder where the threads had previously been collapsed. (I had hoped this problem would finally be fixed in v.115.5.1, but it wasn't.)
How can I get rid of this annoying problem of having to go through and re-collapse each thread individually every time I open a folder? FYI: I am setting up folders individually to thread, not globally.