Do you mean the firmware blobs? If so, then be aware that the firmware doesn’t run in the Linux kernel, and isn’t part of it. They get uploaded to the peripheral devices, and run there. They are often encrypted and signed, so even if you reverse engineer them, and understand what they do, you also need the private keys of the vendor to sign and/or encrypt them before the peripheral hardware accepts them…

Not Open Source hardware or firmware.

License is CC-NC-SA, which fails all formal definitions of Open Source.

Na… The likelyhood of installing some bad or fake app from google play store is much higher than on fdroid.