Why can't I toggle Zyft "on" during installation on Safari mobile?
If you're unable to toggle Zyft on after downloading on Safari mobile, try this:
1. Go to Settings
2. Select "Content & Privacy Restrictions"
3. Toggle "Content & Privacy Restrictions" to on, so that it's green.
You should now be able to go back to Safari>Extensions>select Zyft and toggle "on".