110.0.1 (Build #2015933339), 43c570380+
Works for me fine.
@broadstairs does it work with a private tab with no add-ons?
For that matter, what add-ons do you have? For example, are you using noscript or a similar add-on?
This is a huge leap given it was worded only as a simple query:
Can you please check whether meta and try.discourse.org work with Firefox on your device?
If not, please post a screenshot of the error.