Firefox for Android works like SHIT with passwords. Why?

Hello! I want to easily log into iCloud using my Redmi Note 9 android phone using firefox; so I went into settings and carefully added the URL for iCloud and the password and saved it. BUT, when I then go to iCloud URL and try to log in with my email, the password does NOT work! Why? I must say, I have less and less regard for both apple and firefox. Why, oh why must it be a royal flucking pain in the ass to simply log into a cloud service on your phone? But for apple and firefox, this is evidently asking too much. firefox on android manages websites and passwords like a sh!t sandwich. For example: when I do log into iCloud with firefox android manually, it DOES NOT prompt to save the password! How stupid is that? You want to log into a cloud server quickly and easily? Dream on! No can do-oh on firefox. You'd better scribble your password on a post-it note and bring it with you; otherwise firefox with flock you. It really seems as time marches on, these giant tech corporations get sh!ttier and sh!ttier....unaccountable, indifferent to the peasantry who must suffer needlessly using their sh!tty products. Time to look for a new android web browser as firefox is rubbish. Have a great day :-)