Firefox inspector is empty after several requests

Question

I often use the Firefox inspector, like all day, and now for some reason it works correctly, then it is empty, as shown below. Then I have to close it and open it again, but it disappears after about 2 minutes, so this is not a good solution.

Has anyone seen this before, is there a fix?

Firefox 32.0 (just updated, same in 31.0) Windows 7 Professional 64 bit

Answer 1

This bug is fixed in the latest Firefox. Cm:

https://bugzilla.mozilla.org/show_bug.cgi?id=945749 and https://bugzilla.mozilla.org/show_bug.cgi?id=1002280

This triggered an ID element starting with a number.

Opening and closing developer tools resets them for a while.