Hi gdliloren,
Could well be, browsers are complex beasts. The code now has been tried by 71 users that downloaded and adopted my code, but it now is available elsewhere as well. Your actual webpage load is also depending on various other factors. The SelectionableElementsTable has to do with selecting elements.
I do not know what GetElements type of file is active inside your browser. It is particular for particular web pages that render better and faster, it does not do much for your Internet speed as such I am afraid. But some report 50% improvement in browser speed. We just have to wait and see, and how the Mozilla developers are gonna respond. Maybe it works better in combination with Locationbar2 that I have installed. I spotted the improvement at once, then came out with the code. If we do not do these things we never get anywhere. Thanks for your evaluated report, stay secure...
malware fighter,
polonus