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@get @neko @waifu Vapes do not contain any firmware, that it, socketed ROM chips containing microprocessor instructions.
Depending on the vape, it can be a simple circuit, where pressing the button powers a heating coil that atomizes the liquid, or there can be microprocessors that run trivial software that does battery management and shows battery charge on a LCD; https://upload.wikimedia.org/wikipedia/commons/f/f2/Ijerph_ecig_construction.jpg
For the latter, the software is proprietary, but the manufacturer doesn't ask you to agree to or sign a proprietary software license or offer updates, nor are most (all?) vapes a computer, so as of 2024, vapes aren't a software freedom issue.
There are no free hardware designs for vapes, as generally sane people don't design things that have an extremely high chance of eventually killing you in standard use cases.