The Developer edition of the Mozilla Firefox browser comes with a different, dark theme. Here is a trick which will allow you to use this dark theme for Firefox stable builds. After you follow the instructions in this article, you will be able to get the dark theme in Firefox 35 and above.
Previously, this trick only worked in the Nightly version of the Firefox browser, but yesterday Mozilla released Firefox 35, which also supports this theme. You might need to update your older Firefox version to version 35 before you follow the instructions below.
Here is where you can get it.
- Open a new tab and enter the following text in the address bar:
Confirm that you will be careful if a warning message appears for you.
- Enter the following text in the filter box:
You will see the parameter browser.devedition.theme.enabled. Set it to true.
- Press F12 to open Developer tools:
- Click the Options icon (the gray gear icon on the right) and pick the Dark theme:
That's it. Enjoy the dark theme in your Firefox.
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