All of this sounds pretty good and we’re sure that many users would love to see these extensions brought over onto mobile. Unfortunately it does not seem like that will be happening anytime soon. This is according to a recent Reddit AMA (via 9to5Google) in which the Chrome for Android team answered some questions, one of them being whether or not extensions would be supported on mobile devices.
According to the response given, it seems that by adding extensions onto mobile, it can interfere with the user experience which is why they have avoided doing so. “There are no plans to add extensions support on mobile. We haven’t been able to implement these on mobile and still have it be a good user experience.”
Google did not detail as to how exactly extensions would affect the user experience, but perhaps it could be a performance issue, or as some speculate, extensions such as AdBlock would interfere with how Google serves ads which might be why they are unwilling to support extensions to this day.