Hi,
no sorry, default Fieldgroup is mandatory, it add some hidden fields like ID of user (required by Joomla).

Hi,
this is a know issue of Firefox, when Firefox save credentials then it fill always password field (not only on login form). Normally the password field on edit profile page have attribute autocomplete="off", but Firefox ignore this.

This problem happen also without Easy Profile.

Hi,

can you please tell me on which file i should try that, if it is on easyprofile files?

If you make this, all others browser could be fill.

I'll to completely hide the password field from editing profile with css.

I don't know if this solve your problem, because you have a password field filled and hidden, so users can't update their profile.

Possible solution: you can override Joomla edit profile layout and add some javascript code to remove content from password field
How override file?
- Copy file /components/com_users/views/profile/tmpl/edit.php into folder /templates/your-template-folder/html/com_users/profile/ (create this folder if not exist)
- Edit new file
Override is not lost when you update Joomla.