A cool trick with the crouton extension

[CroutonIsFun]

Ensure the crouton extension is installed and pinned to the Chrome Browser menu, and that you have no browsers installed in your chroot. Open a terminal, then type

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

and press Enter. You will see that croutonurlhandler is the default browser. If it's not (like, you want to keep Firefox or another browser installed), you can choose to manually assign it.

Exit the update-alternatives script and now type

x-www-browser

and press Enter. Voila! You'll immediately jump out to the Chrome Browser in a new tab. To return to your chroot, use the crouton extension to select the chroot.

Note: the very first time you try this after launching your desktop, the x-www-browser command may timeout and/or fail. If so, just press Shift-Ctrl-Alt-F1 to jump back to ChromeOS. Return to your chroot using the extension.

Note: the x-www-browser command will autocomplete after typing a few characters. Try typing x-www and press the tab key.

Note: some desktops, notably xfce and lxde have a generic browser icon on a taskbar. If croutonurlhandler is the default browser, tapping the icon with the mouse will have the same effect as the command, making it easy to jump back and forth.