IMDb.com

I wish to close my account

In Firefox browser (versin 114.0 64-bit) I can't edit my imdb lists. Previously it was work. In the application I will show how it looks:    

I am posting this again after multiple attempts through here (which seemed to have been removed?) and through the standard support channels (where I got 0 response). My watchlists are still not public, can someone please fix this. Main watchlist in question: http://www.imdb.com/list/ls569702314/

Some movie pages are the normal color but I've noticed that some are green, blue, or red, respectively. I was wondering what the colors mean.

How do I make a Back-up from my own list?

Is it possible to find someone's profile on IMDb only searching for their userID (username/nickname). And if this does not exist this would be a really nice feature to have. Or to be able to use an IMDb API endpoint for this purpose

is it possible to change the email associated with my account, as i no longer use the email.

When we make a list sometimes we really don't want any duplicate items (title, people, or image) but sometimes we do. It would be very helpful if there is a notifications "already on the list" or "this is already on your list" when items already been added especially if the list have hundred items,

How can I search a move in my own list? in the app it's possible, but I can't see it on the website...

The response to a question about searching by location was answered 10 years ago. Advanced Search no longer has Filming Location as a search parameter. Any suggestions? Thanks!