Why am I getting this “Cannot use import statement outside a module” error in my browser extension?

I’m creating a very simple browser extension. My code is below

Why am I getting this “Cannot use import statement outside a module” error in my browser extension?

I’m creating a very simple browser extension. My code is below

Why am I getting this “Cannot use import statement outside a module” error in my browser extension?

I’m creating a very simple browser extension. My code is below

Why am I getting this “Cannot use import statement outside a module” error in my browser extension?

I’m creating a very simple browser extension. My code is below

Why am I getting this “Cannot use import statement outside a module” error in my browser extension?

I’m creating a very simple browser extension. My code is below