Maybe Memeory Leak? Rated 2 out of 5 stars

My FF takes a lot of memory after a while, and not responding sometimes when switching tabs.
After examining about:memory, I found that a script
made sandboxes that took lots of memory.
After Google, I found it's in the Resolve IP source code. But I don't know whether it's only for Resolve IP or just a common module of jetpack.
I forgot to save the memory report and I'm not sure whether it's the cause of the memory leak. Will someone check it?

This review is for a previous version of the add-on (0.1.1-signed.1-signed).  This user has a previous review of this add-on.