Consider adding defer/async to webpush headers #139
Description
Lighthouse doesn't like the amount of time it takes to load the scripts, it throws render blocking errors, that's why I recommend adding defer/async to the scripts, so that they are loaded asynchronously or right at the end of the load, reducing the time it takes to load the page.
Maybe make it optional, so that you can control wether you want it to load asynchronously or not.
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