Nintendo Switch does not have a normal Internet Browser for user usage. However, there is multiple browser applets. It is the NetFront NX browser, which is based on Webkit.
When linking the Nintendo Account with Facebook, the Facebook Auth website will open, offering a search box that can be used to browse the Internet ("LoginApplet"). Alternatively, it can be accessed with custom DNS settings which simulate a Wi-Fi login page ("WifiWebAuthApplet" for captive-portal).
Known User Agent Strings
| System Version | UA String |
|---|---|
| 2.0.0 | Mozilla/5.0 (Nintendo Switch; <appletname>) AppleWebKit/601.6 (KHTML, like Gecko) NF/4.0.0.5.9 NintendoBrowser/5.1.0.13341 |
| 2.1.0-2.3.0 | Mozilla/5.0 (Nintendo Switch; <appletname>) AppleWebKit/601.6 (KHTML, like Gecko) NF/4.0.0.5.10 NintendoBrowser/5.1.0.13343 |
The UA is generated with: "Mozilla/5.0 (Nintendo Switch; <appletname>) AppleWebKit/<webkitver> (KHTML, like Gecko) NF/<nfver0>.<nfver1>.<nfver2> NintendoBrowser/5.<ninver0>.<ninver1>.<ninver2>"
Browser Applets
| appletname (From UA) | Usage | Invalid TLS cert handling | Uses whitelist | Title ID | Notes |
|---|---|---|---|---|---|
| WifiWebAuthApplet | Captive-portal | Displays an error dialog with an option to ignore it. | No | 0100000000001011 | |
| LoginApplet | Nintendo Account linking | Just displays an error-code. | Yes | 0100000000001010 | |
| ShareApplet | Posting screenshots to social media | Just displays an error-code. | Yes | 0100000000001010 | |
| LobbyApplet | ? | Just displays an error-code. | Yes | 0100000000001010 | |
| ShopN | Actual eShop client | Just displays an error-code. | Yes | 010000000000100B | |
| ? | General web-applet for use by applications(online manuals, ...). | Displays an error dialog without an option to ignore it. | ? | ||
| ? | News | With videos it doesn't accept the cert. It hangs during video loading without displaying any error, have to press B to exit. | ? |
When whitelisting is enabled, you can only load page domains included in the whitelist, otherwise an error is displayed. This only applies to page navigation. Videos via the <video> tag are not affected, likewise with network requests with JS.
OSS
The NROs for the OSS are stored under a separate title. All of the web-applets use the same OSS NROs via this title.
Video Playback
WifiWebAuthApplet does not fully support playing videos. It will crash with normal videos. However, in some cases with certain MP4s using vulns it will display an error dialog instead.
Trusted RootCAs
While the rootCA(s) for Let's Encrypt isn't included, Let's Encrypt is indirectly trusted via "Digital Signature Trust Co.". This seems to be only(?) the case for WifiWebAuthApplet, hence non-WifiWebAuthApplet seems to have a different set of trusted rootCAs.
WifiWebAuthApplet
When doing a connection-test in system-settings, it will detect that the captive-portal is required and display an error for it when the response for "http://conntest.nintendowifi.net/" doesn't include the "X-Organization: Nintendo" HTTP header. The web-applet will not load until something else attempts a conntest, for example when launching eShop and prior to LoginApplet launching. The initial page loaded by this applet is the above conntest URL.
This is only available starting with 2.0.0.
Versions
2.1.0
See here for vuln-related changes.
For the WebKit NRO, the page-aligned size for the R-X, R--, and RW- pages are the same as v2.0.