wmkarreman said

every time I open Firefox mail . . . .

Are you talking about webmail? Or are you talking about Thunderbird?

Thaks for helping, every time when I send a mail the promamm asks for my password, curious

greetings wim

You posted in the Firefox support fora queue. Firefox doesn't do email, it's strictly a web browser.

If you are using Firefox to access your mail, you are using "web-mail". You need to seek support from your service provider or a forum for that service.

If your problem is with Thunderbird, let us know and we can move this thread to the Thunderbird support queue.

What do you have set for your homepage? Could it be that your homepage requires a logon and you are clearing cookies as Firefox closes, therefore overriding the ability for Firefox to use "Remember Me" for that website?

Also,

when I send a mail the promamm

Not to be overtly critical or too blunt, but WTF does that mean? Please spend the time to express yourself a little bit better. Fred and I both spend most of our waking hours here trying to help other Firefox users solve their problems with Firefox. Please see this: https://support.mozilla.org/en-US/kb/how-do-i-use-firefox-spell-checker

And if a word is underlined in red - please correct the spelling so that we don't have to figure out what you are saying.

Dear Edmeister Thanks for your correction and sorry I used the wrong word. Even the correct spelling 'Program' may be not the right word. (I am not a native speaker).

Thanks for your patience! I will use your suggested link and will not take more of your time

Greetings, wim