ਅਕਤੂ 23, 2017 ਤੇ Realraven (Axel Grude) (Developer) ਵੱਲੋਂ · ਪਰਮਾਲਿੰਕ

... because it will not work from Firefox 57 - they will deprecatee all XUL based addons (and this is not possible with web extensions). Only Workaround: switch to Firefox ESR release or Pale Moon.