ChatZilla 0.9.88.1 fixes opening links when no browser window is open.
ChatZilla 0.9.88.2 fixes inline buttons (cancel/reconnect, DCC accept/reject, etc.) in Firefox 11 and later.
ChatZilla 0.9.89 fixes links with non-lower-case schemes, /part outside of channel views, IPv6 address literals in irc: URLs and improves history and plugin support, plus some spelling fixes.
ChatZilla 0.9.90 fixes proxy connections in Firefox 18, preferences window being empty in SeaMonkey, /delayed losing execution context, /ignore not ignoring invites, close not working on channels on disconnected networks and certain IPs not decoding properly in DCC messages. Tool-tips have been added to tabs and unhiding key-protected channels no longer prompts for the key unnecessarily.
ChatZilla 0.9.91 fixes problems with /join and /part when multiple channels are specified, saves the name of renamed tabs and adds per-view sound events and visual notifications.