Hi,
Basically, when do you plan to remove the XUL-based Tor Launcher from the stable Tor Browser series?
Background: since Tails likely won't be able to switch to the WebExtension version easily [0], my hope is that you will continue to ship the XUL version throughout the 7.0-series, based on 52esr, and only switch to the WebExtension once Tor Browser is based on 59esr (which I suppose will happen either with 59.0 in March or, or 59.1 in May). I.e. that we in Tails still have plenty time to find a solution [1]. :)
Cheers!
[0] We run it as a stand-alone XUL application, not a browser extension. [1] FWIW: the solution could be to run a locked down browser dedicated to the Tor Launcher WebExtension *only*. Or switch to Whonix' anon-connection-wizard: https://www.whonix.org/wiki/Anon_Connection_Wizard