Big memory leak on remove button

[mixmastamyk]

Hi, I found hundreds of sites under my "Global Preferences" / "Configured pages" page after several years of usage. I want to delete most of them, to keep that list reasonably tidy.

Believe it or not, every time I remove one Firefox leaks several hundred megabytes of memory. Meaning I can only remove about ~30 or so sites before having to restart the browser. Or the machine will start swapping and soon after that, have to wait until the OOM killed the browser to get it to respond again.

Never seen such a huge leak so curious what is happening? Haven't made much progress on the list as you can tell.

I tried to look though the configuration but could only fine one empty sqlite file. Where is the "configured sites" list kept?