Immersion section slows down my browser's perfomance

[Wandering.Seeker]

I was browsing french articles in need of translation, suddenly I've realized that scrolling up and down became so slow.
I checked my task manager... voila! immersion section made my firefox browser gradually grow in memory usage. (I tested it again, only having immersion as the only tab on Firefox)
I was wondering if there is something can be done about this technical issue, so I don't have to close and start my browser again.
thanks in advance.