Picture quality still reducing too much even after configuring resize images extension on firebase

I have an image upload function on my application that is using firebase as a backend. I've enabled the Resize Images extension, but the quality was too low on jpeg and webp files. In order to counteract this I added some Sharp Output Options as follows:

{"jpeg": {"quality": 100}, "webp": {"quality": 100, "lossless": true}}

There's no real information out there about what the potential values are for these fields.

You can see their suggested formatting for the Sharp Output Options here:

Sharp Output Options

That's all the info I can find.

However, the image quality did not change after this config. Both before and after setting this configuration the image sizes were identical.

How can I properly set this configuration and increase the quality of the compressed images?

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