I'm connected to my wifi but i can't use firefox

[j8a]

Hi,
I could be able to help you whether you provide a bit more information about the hardware.

Please, open a terminal command window and execute the following commands:

inxi -FazN

sudo rfkill list all

dmesg | grep NetworkManager

lspci -v

You can put the output on the answer trying to format the text, exactly as is appearing in your terminal window.

Hope this help, regards