At a mostly blind guess, I'd say that's from the old, old, old hack that allowed to bypass the filetype download restrictions in the browser, or something

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None of my own stuff block OTA updates, since that kinda was the day 1 goal for each and every one of 'em

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Kubrick could certainly work, but it might be a tad overkill if you can simply uninstall the right stuff first ^^.