Thanks for installing/upgrading FireTitle.
This is the last upgrade of FireTitle XUL version. It won't be supported anymore as it won't work on Firefox 57+ versions.
There is a new Webextension version, called (for now) "Crappy Firetitle". This version is still experimental and has less features that the original FireTitle add-on since it is constrained by WebExtensions APIs.
We hope Firefox developers will enable us to port the missing features before Firefox 57 release so that Crappy Firetitle won't be that crappy.
Mozilla's Add-ons for Firefox: