I have bought a Westinghouse 58" smart TV but it has no built-in web browser. Can I add web browser into this TV?

Question edited for clarity.

There is a rather 'round about' way of doing it and it starts with your computer!

Installing Apps using APK Installer on my Sinotec TV Home screen

• Open your browser on your computer, find the APK file you want to download, and select it.
• Once the App is downloaded, open Downloads, right-click on the APK file, then save to USB or external storage device.
• To install this APK from your storage device to the TV, plug the USB into the TV.
• On your HOME screen, go to APK installer, and select the APP you would like to install
• The app will begin installing on your device.
• After the application has successfully been installed the user can run the app with no issues.
• Please Note: Only selected smart models have the "Install APK" function.

https://www.sinotec.co.za/support/faqs/

Specs for your television says it comes with

• Netflix
• YouTube
• Twitter
• Facebook
• Mirashare
• Digital Dvb-T2
• Child Lock

Sinotec 58" UHD Android TV

Sinotec https://www.sinotec.co.za > product > sinotec-58-uhd-...
Open Browser: Yes; Prime Video: Yes; Netflix: Yes; DSTV Now: Yes; Showmax: Yes ... STL-58G50UM. Sinotec 58? UHD NETFLIX LED TV. Resolution: 3840 x 2160. View ...

..

Yes, you can reset your old Westinghouse smart TV by using reset codes. The specific code you need may vary depending on the model of your TV. Here are some general steps you can follow to reset your Westinghouse smart TV using reset codes:

1. Press the power button on your TV to turn it on.
2. Using your TV remote, press the "Menu" button and navigate to the "Setup" or "Settings" menu.
3. Look for the "Reset" option and select it.
4. Enter the reset code for your TV when prompted. The reset code may be a sequence of numbers or a combination of buttons on the remote control.
5. Follow the on-screen instructions to complete the reset process.

If you don't know the reset code for your Westinghouse smart TV, you can usually find it in the user manual or by contacting Westinghouse customer support. Keep in mind that resetting your TV will erase all custom settings and restore the TV to its factory default settings

What TV?
You will need to have a smartTV that supports the service, or use a computer, or use an outboard streaming device
https://help.disneyplus.com/csp?id=csp_article_content_international&sys_kb_id=eac89167db3048900a2af56e0f96193b

Desktop Web Browsers (via streaming)
Disney+ desktop browser system requirements
Mobile Devices and Tablets (via free downloaded app)
Android phone and tablet
Apple iPhone and iPad
Smart TVs (pre-installed or via free downloaded app)
LG WebOS Smart TVs
Samsung Tizen Smart TVs
Android TV Devices
Set-top Boxes and Game Consoles (via free downloaded app)
Apple TV (4th Generation and later)
Sony PlayStation 4
Roku
Xbox One
Other Streaming Devices (via free downloaded app)
Chromebook
Chromecast
Apple AirPlay
Amazon FireTV

Just get a WiFi extender...this will definitely increase the signal..the tv adapter is generally built-in, but the software might be upgradeable...cheers

Try the return button on your Westinghouse remote.

Yes.

The MSN Web browser is only available for the Microsoft Windows operating System.
You can still goto http://www.msn.com to view msn website. But there does not look like any way to install and use the msn browser on your tv.
Most of the smart T.V.'s are designed for a general experience, so the browsers often have less features.

Maybe there is a setting that should be SAVED.