bug#38323: [Bug-gnuzilla] Can't sign in to Firefox Sync

[bill-auger]

On Thu, 8 Aug 2019 20:42:42 +0000 Davide wrote:
> Maybe there are privacy concerns about Firefox Sync service,
> like any other cloud service

i dont think thats the issue - this is a recurring bug over the
years - the sync feature has been working in some icecat
releases and not in others

https://savannah.gnu.org/bugs/?func=detailitem&item_id=50960

with v68, the only apparent clues are this line in the shell
terminal:

  console.warn: LoginRecipes: getRecipes: falling back to a
  synchronous message for: https://accounts.firefox.com

and this error in the browser JS log:

  Working…
  Response not received for: fxaccounts:can_link_account