That sounds like internet issue or the site is down or offline. Since this happens on all browser then it's not those browser or Firefox browser at this point.

Suddenly i do not have access to a website and only this. the domain is wetranfer.com Actually i do not have access with any browser. not only mozilla firefox I use the default Microsoft defender but i can't find anything in firewall that blocks access to this site. Any help?

Perhaps you mean https://wetransfer.com/ ?

Yes, misspelled. https://wetransfer.com

........

No. Site was not down. Any way i solved the problem by just disable temporary all connections from Windows security and then enadled again

Great. Mark it as resolved and have a nice day.