When switching away from the firefox dev tools theme, it's not possible to go back to the developer theme if another theme besides the default theme is selected. Perhaps this is as designed, but it's confusing. Steps: (build 35.0a2 (2014-11-05)) - de-select developer theme - select another theme besides default australis - try to switch back to developer theme, not possible. I have to go back to "default theme" otherwise it doesn't switch back. It should just automatically deselect the selected theme and switch back.
This is being handled in 1094138