User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:40.0) Gecko/20100101 Firefox/40.0 Build ID: 20150330114816 Steps to reproduce: The dev edition theme isn't available anymore. Even if you click on the button. Expected results: It should works! :) Oh and by the way. Yesterday, the dev edition theme was available via the theme list, which is was cool. A button to active it isn't a good idea in my opinion.

The theme work was temporarily backed out. It will be relanded in bug 1148996.

Thank you jryans.

(In reply to Erwann Mest from comment #0) > Created attachment 8585945 [details] > screenshot 2015-03-31 at 10.43.30.png > > User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:40.0) > Gecko/20100101 Firefox/40.0 > Build ID: 20150330114816 > > Steps to reproduce: > > The dev edition theme isn't available anymore. Even if you click on the > button. > Is the button not visible at all? That pref could have been cleared out after you pulled down the updated version. You may need to set browser.devedition.theme.showCustomizeButton = true and then restart the browser to get it to show back up. Hopefully it will be back in the addon manager soon.

- 2 or 3 versions ago, it wasn't a button but a theme listed in "themes": new feature, good point - now, it comes back as a button ("use dev edition theme"): regression in my point of view - `browser.devedition.theme.showCustomizeButton` is already as true - `browser.devedition.theme.enabled` also as true

(In reply to Erwann Mest from comment #4) > - 2 or 3 versions ago, it wasn't a button but a theme listed in "themes": > new feature, good point > - now, it comes back as a button ("use dev edition theme"): regression in my > point of view > - `browser.devedition.theme.showCustomizeButton` is already as true > - `browser.devedition.theme.enabled` also as true OK, so the button is working then? I took the wording in the description to mean that the button didn't work. The button will go away again once Bug 1148996 lands.

The button works and changes `browser.devedition.theme.enabled` property but nothing appears about firefox theming.

In other words, I am currently with the default firefox theme. I don't/can't have dev edition theme.

(In reply to Erwann Mest from comment #7) > In other words, I am currently with the default firefox theme. I don't/can't > have dev edition theme. Oh, that's probably because still you have a lightweight theme ID selected (the devedition theme). Can you try resetting the lightweightThemes.selectedThemeID pref?

`lightweightThemes.selectedThemeID;firefox-devedition@mozilla.org` -> reset Oh my gooooooooooooooood, it works ^^ Thank you Brian. ;)

It works pretty good now, thank you. :)