Firefox offers to automatically save user IDs and corresponding passwords on a site by site basis. It then will offer (or in some cases just insert the information) on the same site's login page when you return. This seems to be called "autofill" in the documents. However, for some sites (and this appears to be random), when confronted with a login page, not only will Firefox automatically insert the user ID and PW (autofill), but for each step it will ALSO accept the insertion to move to the next question, effectively automatically log in. For example, for one site, when I open a new tab and navigate to a site that I had previously saved user ID and PW for, the login page will briefly flash, and then I will be automatically logged into the site. There seems to be no name that I can find to describe this behaviour that distinguishes it from the "autofill" described above. I will call it "autologin" for this question. My question is how to control this behaviour? I have not consciously chosen to have Firefox autologin for any site, but I do save ID and PW for the autofill capability. Is there a way to turn the autologin on or off (i.e. control it) for specific sites?