Overlay Problem with Other Extensions

[Damien Ayers]

The Ubufox extension is somehow disrupting the installation of another Firefox extension that I'm developing.

My extension includes an overlay that adds a right side sidebar to the main browser window. When Firefox loads, the first time after installing my extension, the side bar is not visible and checks with DOM Inspector show that the overlay hasn't been properly applied. Restarting Firefox again and it all works perfectly, and continues to work okay.

Disabling Ubufox makes the problem go away, my extension installs properly straight away. I've also tested against Firefox running under Fedora Linux (which includes no extra extensions) and on Windows, which also works fine, so it does somehow seem to be related to Ubufox. I've tested on a default install of Ubuntu 10.04 and 10.10, and the problem occurs with both.

I've trimmed my extension down to the absolute minimum possible, just the sidebar overlay, with no javascript, and this simple test extension is attached.