![I-Firefox logo](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/products/2020-04-14-08-36-13-8dda6f.png)
Logging into sites
I am on a MacBook Pro. I cannot log into my United.com account. I have discovered that I can't use other airline sites, either. Then I checked Costco and I can't log into my account there on Firefox. I can log into all accounts using Safari.
I am on a MacBook Pro. I cannot log into my United.com account. I have discovered that I can't use other airline sites, either. Then I checked Costco and I can't log into my account there on Firefox. I can log into all accounts using Safari.