What steps will reproduce the problem?
1. Open a tab's drop down history: right click the BACK ARROW to the left of
the address bar. (Note: only works when a tab has a history!)
2. Press ESCAPE key.
3.
What is the expected output?
The drop down HISTORY menu should close.
What do you see instead?
Nothing happens to the window.
What version of the product are you using? On what operating system?
Firefox 27. Windows 7 profressional.
MLB 0.5.4
Please provide any additional information below.
I just upgraded from Firefox 14. There, this problem did not exist.