Issue Summary

A few customers are unable to perform actions on their cards when using Trello on Mozilla Firefox

Steps to Reproduce

No concrete steps to reproduce. We'll update once we have more details on how to reproduce this problem. 

Expected Results

Customers should be able to perform any actions while using Trello on Firefox

Actual Results

Customers are receiving the following error message when trying to perform any action on their cards and boards:

"CSRF detected","error":"REQUEST_CSRF_ERROR"

Workaround

A few customers reported that using a different browser, such as Google Chrome, MS Edge, or Safari, solved their issue. Others mentioned that using Firefox’s incognito tab or clearing their browser’s cache and cookies helped solve their problem. In short, customers can use a different browser, try using Firefox’s private tab, or clear their browser’s cache and cookies to solve the problem.