Rated 5 out of 5 stars

Does everything promised except for one thing... if you use the Assistant, it will not keep the setting "Enlarge searchbar on first strike". It will work just after you first set it, but after restarting Firefox, it reverts back to "Size incrementally, to each letter". Is there a way I can make it keep the enlarge on first strike option permanently? It used to work in earlier versions prior to 2.0. Also, this option cannot be selected without using the Assistant, to the best of my knowledge.

UPDATE: Yes Mr. Cox, it does seem to be fixed in v2.0.8 (even after restarting Firefox), as long as the minimum searchbar width isn't set at -1. Thank you.

This review is for a previous version of the add-on (2.0.7.1-signed.1-signed). 

Yes, I should have this fixed soon. I have created a bug report for you. https://sourceforge.net/p/autosizer/tickets/19/