fix: Improve extraHeaders feature detection #787
Merged
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On Firefox forks the
runtime.isFirefox
detection will fail (because the browser name is not 'Firefox'). This leads to an error when registering webRequest listeners as theextraHeaders
option is not needed, preventing the extension from loading.There is actually an extension API that can be used to detect support for this option:
OnBeforeSendHeadersOptions
.This PR updates the feature detection check to explicitly look for this API. We have to also check to for the presence of
OnBeforeSendHeadersOptions
as it does not exist on Edge.