I'm using Galaxy Note 2
Nowadays, every link in FB app and in Whatsapp is opened in the native browser
I want to make Chrome the defualt browser for all actions including these two apps.
How can I do this?
Head to Settings -> Apps -> All -> Internet -> Clear Defaults. Next time you do a search or open a link, you'll be given a choice of which app you want to open it with. Select Chrome and put a tick in the "Make Default" checkbox and that should make Chrome the default browser.
While j0chn's description works (and also does work for other "default apps"), it might not be the most user-friendly approach. As Android itself does not offer anything else, you might want to pick a helper. Default App Manager is such a helper:
Default App Manager (Source: Google Play); Click images to enlarge
As the screenshots show, this app lists up default apps defined and lets you clear those defaults -- but it also lets you define them.
I did it like this:
Go to Settings→application manager→all. There to "internet browser", click on that and delete that "is default". When next time started the desktop link asked me for default browser.