Rated 5 out of 5 stars
This is how it should be. Tnx for the work you've done!
I was not enable to do a search only for sender, recipents, subject..... p.e. doing a search for "john" with the sender button enabled returns all messages with john but not only in the sender field. I want to see only john in the sender field. Even if I click on the button afterwards, nothing happens.
Can you try if the built-in filter bar behaves the same? (if that is hidden, check the Add-on options and disable the 'hide built-in filter bar' and 'filter box' options)
Does not work as intended for you disabling all but 'sender'?
What's your Thunderbird version?
Thanks for your feedback!