Comment 4 for bug 553946

I think the problem here is that the filebug form does not exist when the page is later shown:

        <div id="filebug-form-container" style="display: none;">
        </div>

It is created later by javascript. I suspect this means it is not covered by the usual form-value-remembering mechanisms in browsers. If that theory is right, it might work better if the form was present but hidden or disabled.

Several other bugs have probably the same root cause such as bug 735290 and bug 513591 and the user frustration in bug 560246 (bearing in mind +filebug may be the first POSTed form after a user logs in.)