Rated 4 out of 5 stars

Other highlights color not set!

This review is for a previous version of the add-on (0.5.2). 

What "other" highlights? Do you mean the highlights color dropdown in FindBar Tweak's preferences? It should work fine, what other add-ons have you installed (try disabling them and see if it still happens) and what firefox version on what operating system are you using?