How to install a Plasmo-built extension into Firefox?

I've been following the "Getting Started" guide and was able to Load unpacked extension into my Chrome browser; but as I usually use Firefox, I wanted to check how that will work in that browser

so what I did was

pnpm plasmo build --target=firefox/mv2

cd build/firefox-mv2-dev

web-ext build

a folder "web-ext-artifacts" was created that contains "dev-<my-extension-name>-0.0.1.zip" file

but as I try to install it into Firefox via "Install add-on from file" action, I get "addon could not be installed as it appears to be corrupted"

How do you guys do it? is Firefox even capable of using extensions built with Plasmo?

PS: the contents of the zip seems to be identical to the byte with the contents of "firefox-mv2-dev" folder

PPS: using Firefox 126.0.1 64-bit, Plasmo 0.86.3
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