https://www.airgunbbs.com

Write that down.
Close this page, clear your history, delete any links to the BBS from your favourites/bookmarks. You DON'T need to clear cookies OR passwords.

Open a new page, type in the address you wrote down and enter (if autofill offers up ANY options you haven't deleted ALL previous links). You will need to log in again. Once in, either save this page as a favourite/bookmark or navigate to your preferred landing page and save that.
Job done.

Atb
Chris