It hasn't been fixed as long as the relevant bug hasn't been as resolved.

• 1781213 - Nothing happens when importing a file on the “about:logins” page

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Importing a CSV login file is broken in Firefox 104 and 105.

• /questions/1387155 Importing Password CSV File Exported From FireFox Doesn't Work

You could try the fix mentioned in this Reddit thread (and in the bug report). Remove the blank space in the link.

https://www.reddit. com/r/firefox/comments/vzq8fj/firefox_nightlys_logins_passwords_not_importing/igg0plb/