
This is because you are using a release edition of Firefox. But the problem may persist after you set to false.
#Firefox developer edition addons install#
How do I install an unsigned Firefox extension? You may find this post which tells you to turn off in “about:config” tab. Click on the menu item and choose the zip file formed in previous step. On the “about:addons” tab, click the gear icon, you will see a menu item: “Install Add-on From File…”. Typically, your extension includes the following files: manifest.json(containing the information of your extension), icons(directory) containing the icon of your extension, script.js(the real work is done in this script).

Now, your custom extension is active and you can observe its effects when you visit some web page on another tab of this Firefox. If there is no problem, the information of your extension is shown below. Click the “Load Temporary Add-on…” button on the right column, then locate and choose the manifest.json file of your custom extension on the popped up file dialog.Click “This Firefox” on the left column.


Type “about:debugging” in the address bar of your Firefox browser and press enter.
#Firefox developer edition addons how to#
After writing your favorite Firefox extension, you must know how to load it into Firefox:
