I got tired of viewing sites in Chrome that constantly had ads popping here & there, moving text up & down while trying to read. Ad block add-on in Firefox is great. But that was the only + feature. Cannot 1) import bookmarks (no option in Settings/Customize), 2) move quickly between tabs because they're not actually tabs like in Chrome, 3) move video slider; instead page swiped over to next tab. I'm torn because I really like the ad block but cannot import my Chrome bookmarks/settings.