Ubuntu – Add Google Chrome to Default Applications

Turns out that there is this little application called "Preferred Applications" and you can set your default browser there. I figured this out, 2 minutes after posting my question. Well, three things are a mystery to me:

1. Why was my default changed?
2. How is a "new" user supposed to know about this "Preferred Applications" utility? This utility is not in the launcher, and I only recalled it by sheer luck.
3. Why are the settings within Firefox and within Google Chrome not working?

I had similar problem with my Xubuntu 13.04 and I solve it with this commands.

$ sudo update-alternatives --config x-www-browser

  Selection    Path                Priority   Status
------------------------------------------------------------
  0            /usr/bin/opera              200       auto mode
* 1            /usr/bin/chromium-browser   40        manual mode
  2            /usr/bin/firefox            40        manual mode
  3            /usr/bin/opera              200       manual mode

Press enter to keep the current choice[*], or type selection number:

x-www-browser was set right because I want to use chromium-browser but problem was with next command where for gnome-www-browser was set opera.

$ sudo update-alternatives --config gnome-www-browser

    Selection    Path                Priority   Status
------------------------------------------------------------
* 0            /usr/bin/opera              200       auto mode
  1            /usr/bin/chromium-browser   40        manual mode
  2            /usr/bin/firefox            40        manual mode
  3            /usr/bin/opera              200       manual mode

Press enter to keep the current choice[*], or type selection number:

So you just need to select the browser you want to use, in my case its chromium-browser, so I entered number 1 and it solve my problem with Lunch Dropbox Website in different browser.