Many publicly accessible Internet connections (usually available through a wireless network connection) require its users to register and login in order to get access to the Internet. This include both free and paid for services that may be found at Internet cafés, libraries, airports, hotels, universities etc. Normally in these situations, a so called captive portal intercepts any website request made and redirects the web browser to a login page. None of that works when Tor is used, so a browser with unrestriced network access is necessary. Note that this means that the Unsafe Browser is NOT anonymous, so use it carefully.
Tails includes an "Unsafe Browser" for this purpose, and it can be
started via the menu: Application -> Internet -> Unsafe
Browser. Its red/yellow theme should make it fairly obvious that a
different (and in this case, unsafe) browser is used compared to the
normal, safe web browser included in Tails.
Security recommendations:
While this browser can be used unrestrictively for anything, it is highly recommended to only use it for the purpose stated above, i.e. to access and login on captive portals.
Do not run this browser at the same time as the normal, anonymous web browser. This makes it easy to not mistake one browser for the other, which could have catastrophic consequences.
When using windows camouflage the red theme is disabled in order to raise less suspicion. It is still possible to quietly identify the Unsafe Browser since it has English Wikipedia as its default (and only) search engine in the Navigation Toolbar. The lack of the onion icon added by Torbutton is another such small visual reminder.
