Rated 5 out of 5 stars
I have been hoping for improvements in TB's search function for quite a while. The is a significant improvement in search usability. THANK YOU!
A nice cosmetic improvement would be a searchbar that expands as you type, similar to the function of the Firefox extension "Searchbar Autosizer".
First, thanks for the feedback. The extension "Searchbar autosizer" seems good for Firefox but Thunderbird have a built-in autosizer behavior (different to that extension): when more icons are added to the toolbar, searchbox size decrease; when more space available, searchbox is bigger. I think this behavior is enough and works good, but if you know some cases in that this fail or is have problems please tell me!