Firefox "crashes" to all-white screen

So this has been happening starting just recently, only a few days ago. When doing random tasks or just browsing, with either 1 tab open or 8 tabs open, Firefox will sometimes freeze indefinitely, though the cursor still changes to an I-beam over inputs and a pointer over buttons and link elements. I can minimize the window using the minimize button, but when I open the window again from the taskbar the window is now completely white. If I have two instances of Firefox running when this happens, the other freezes in the same way.

I'm not getting any crash reports and when I close the window or end the task from the task manager it acts as if I had normally closed a window, not restoring the previous session as Firefox would do if it actually crashed and the crash report handled it.