[insin]

You can also, more conveniently, plug an extension's URL into this viewer:

https://robwu.nl/crxviewer/

[Y_Y]

Now I have to trust that viewer doesn't hide the malicious code, nor that my browser does (presumably from an existing untrustworthy extension)

[tetris11]

It'd have to be adept at spotting it in all its forms first in order to hide it, which seems expensive for a free viewer