Not able to use my internet on zorin lite

I installed Zorin Lite on my system today, and I used the internet on my system only once. But when I restart and try to access the internet again, I'm facing a problem. I am unable to access the internet for some reason. I am using USB tethering for internet access. The notification shows that I am connected, but when I open Firefox, it shows an error.



see

I'm sorry for my previous image..i forgot to type sudo... I'm using linux for the 1st time.
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this is my 2nd image..in this i did it right.

no problem..thank you for trying and helping me..i hope someone will help me

Can you please post the terminal output for

lspci -nn

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