Mozilla is currently recommending this extension, so I'll check with them first, maybe they have suggestions. But the default course of action would be to fix known issues, then disable extension listing. So people already having it will be able to continue using it for a while.
I definitely don't want to transfer it to some random person. With around 50k users across all platforms, this is bound to end up with some more or less questionable monetization scheme.
It appears that I released the first version of that browser extension in December 2011. Time flies…
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