Telegram Web (https://web.telegram.org) does not work in Parabola's GNU IceCat (38.6.0_gnu1-2) or Iceweasel (1:44.0.2.deb1-1). The page appears blank except for the background colour and page title. It works in Tor Browser and Debian's Iceweasel so I guess this has something to do with Parabola's modifications. Which one, though?