Some employers will disable Firefox developer tools via policy files. To re-enable developer tools, perform the following steps: Run regedit Search for key: Computer\HKEY_CURRENT_USER\Software\Policies\Mozilla\Firefox Set key DisableDeveloperTools to 0 The instructions below show how you can programmatically change your registry. If the registry entry you are going to change is already in the registry, the simplest way to create a …