I've recently downloaded and began using the Adblock browser recently and have switched from the Facebook app to using the mobile version in the Adblock browser. Even with the newbie limitations, I am really enjoying using it. I have noticed that when I click a link in FB, it opens in two browser tabs. I always need to close 2 tabs every time.
The other thing that is kind of annoying is that when I go back to the Facebook tab, it always refreshes the page. I never get back to where I was when I clicked on a link that opened a new tab.