Manifest warning in Firefox: event pages are not supported #4805

Please ensure:

• The bug is caused by Refined GitHub. It doesn't happen if I disable the extension.

Description

Going to about:debugging > This Firefox in Firefox shows you the following error:

Warning details

Reading manifest: Warning processing background.persistent: Event pages are not currently supported. This will run as a persistent background page.

Not sure if this is significant, since I don't see any features erroring or not working.

Screenshot

Console errors

None

Example URL

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Browser(s) used

Firefox