You're right that Firefox also opposes some of these specific implementations in its current form, and that Google often rushes features. However, that doesn't diminish Apple's conflict of interest at all, so sometimes their arguments happen to align with reality just as a broken clock is correct twice a day. Apple applies many double standards e.g. they allow native apps to access these hardware features (where they happen to collect a 30% tax) but block the Web from doing the same (where they collect 0%). If privacy was the only concern, they would work on a safe standard, but instead they block the capability entirely to ensure that any of the App Store's rivals remain constrained and thus inferior such that the App Store's revenue isn't threatened.

Are the Chrome features useful? Are they open? If it’s bad for users (e.g. some new ad tracking) or if it’s proprietary and thus expensive to license or reverse engineer that’s one thing, but if it’s not that, then refusing to ever adopt those standards (or to provide their own alternatives) is either foolish NIH syndrome on Apple’s part or it’s greed.