Save As and Print dialog boxes appear behind Firefox which locks everything. How do I move or shut down Firefox while its waiting on a hidden dialog?

Question

When this happens I can't access the dialog or move or close Firefox, including from the Task Manager (Task Manager says it's waiting for Firefox to complete the operation). I usually have to shut down the computer.

Answer 1

cor-el,
I kept forgetting and procrastinating about following your instructions, since I have internet access only for limited amounts of time and usually I am busy with important tasks when I am.
Out of the blue, the problem corrected itself (the Save As box started to open full screen, then shrunk down to a normal size and the edges can now be dragged to a custom size).
Even the copy and paste problem in the filenaming area seems to have been less troublesome lately even though there have been no updates to Firefox in a few weeks.
Even though I marked the solution as not helpful, the problem has in fact been resolved. I will save the solution instructions in case the issue returns.