Have loved ColorfulTabs for a couple years now & thank you for all your hard work; it has always been a 5-star add-on in my book. The newest update in response to the FireFox57 update has rendered ColorfulTabs unusable for me; because of that, I had to disable it & I gave the update one star (because how else would you know what's happening?!). However, I know it will just be an interim issue since Mr. Sharma has always been extremely responsive to his users' needs & I will certainly change my rating once the bugs are worked out. To other reviewers: please be patient & not so quick to make absolute statements indicating "it used to be good, now it sucks, I quit you"... give the poor guy a chance to work out the bugs... he always does! The problems I am encountering are the same as many others here: can't read the inactive tabs with all of those being colored black. In addition, I have always used the option to make my tabs as small as possible & I miss having that option available. I'll be checking back periodically & plan to reactivate ColorfulTabs after the bugs are worked out. TY!