I used to be able to enter an address from a secure website and be able to access when I had internet explorer and with firefox I dont know where to enter address so I can access the secured we site.
Firefox doesn't have security zones like Internet Explorer. There's no Trusted Sites list to add sites to. Normally, web sites simply work, whether they're secure or not.
If secure websites don't load, see the following article.
If the website does load but you're having some other problem with it, see the following article.
If neither of those answer your question, please post a link to the site and or a description of what doesn't work, or whatever error message is displayed.