Created attachment 8455241 [details] Screenshot 2014-07-14 13.22.50.png User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release) Build ID: 20140605174243 Steps to reproduce: At the office i have an imac wich runs xdebug and various other dev tools. My firefox has the sync function enabled for everything. Now i want to add the profile button to my interface using the customize button in the "hamburger" menu. Actual results: I am working on my laptop and i want to start a profile on a website through an firefox extension. But the button is gone and when i check the customize layout screen, there is nothing to drag and drop. In the attached screenshot you will see that i have extension installed. But the screen doesnt offer me any icons. Expected results: i would like to see all the buttons that all the extensions have to offer.
If I understood the description correctly, you got an extension (what extension?) installed via sync and it doesn't function properly? Does it persist after restart? Manual reinstall? If installed in a clean profile on the same machine? Currently listed 'steps to reproduce' are not really the steps a developer can follow to reproduce the issue, so the chances of it getting fixed are pretty low without additional information.
Summary: an extension's button disappear, and there is nothing on the customize view.