If the web browser doesn't open, it might be due to a simple conflict, which can be resolved if you restart your device.
See don't know how to restart my device for more details.
It is very important to check for and update your operating system regularly so that you ensure its stability and security. Every new release includes fixes for different bugs, found and reported by users.
Check out the don't know how to update my operating system to learn how to check for updates and update your device, if an update is available.
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