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Firefox | Reading manifest: Error processing content_security_policy.extension_pages: ‘script-src’ directive contains a forbidden http: protocol source #160

Answered by aklinker1
JVariance asked this question in Q&A
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This is a bug in Firefox. I've reported it here already: https://bugzilla.mozilla.org/show_bug.cgi?id=1864284

For now, dev mode doesn't work in Firefox while using MV3 because it's trying to add http://localhost to the manifest's CSP, which is required for HMR.

To test against Firefox MV3, build for production and load the extension by hand.

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