I've been using Firefox for a while and it is one of the best browsers I have used. The ability to just view pdf links as documents instead of downloading them is the feature that made me stick to it. But I've been facing a problem that's annoying. Only Google's cookies are cleared automatically. It won't keep me signed in like other sites. When I quit the browser, only Google cookies are cleared and I'm signed out of my account. I don't know if it's a Samsung related issue as my friends are not facing this. I've reported this on bugzilla as well. This is the bug id: 1940021.