Firefox problem

[darkoshi]

Whenever I open a new Firefox browser window, it now seems to lock up my computer for several seconds. It used to be, I could right-click a link to open it in a new window, and continue reading/scrolling the original window while the other one opened. This is something I do fairly often, sometimes opening 2 or 3 other windows, while finishing reading the first. Now the browser locks up until the new window finishes opening.

It's either something with my computer, or something with a recent Firefox update. Anyone else notice anything similar?