3.26.4 - December 12, 2017 ========================== - Fix sync failure warnings appearing multiple times (#790094) - Fix tab sync and device name on accounts.firefox.com (#790370) - Make default sync device name translatable (#790905) - Several additional misc. improvements to sync support (including #790819) - Flatpak: custom stylesheets are now supported - Flatpak: view page source is now supported