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Hi everyone.
I am here to find out the answer for my problem. I got the message error: import declarations may only appear at top level of a module.
With my limited knowledge, I don’t know how to handle it, so I need your help. I really appreciate everyone’s time and effort. Thanks a lot.
The cause: Firefox browser will display the SyntaxError: import declarations may only appear at top level of a module problem since you didn’t utilize the
type="module"
attribute.Solution:
So you need to Add
type="module"
to fix the problem.Prior to importing the JS file, first, turn on the
dom.moduleScripts.enabled
option inabout:config
and then addtype="module"
to your script tag.Finally, use: