You can restrict access to the source editor to a particular group of users. To restrict the users' configuration, go to 
→ Manage Apps → User-installed apps → Source Editor → Configure. The Source Editor Configuration page is displayed.
The following are the parameters you can configure as per your requirement:
Parameter | Default | Description |
|---|---|---|
Allow all | Checked | This option allows all users to access the source editor. |
Restricted to groups | - | This option allows you to specify the users who can access the source editor. For example Administrators, Developers. To access this option Allow all should be unchecked. |
Help us improve the product | Checked | The Source Editor for Confluence app gathers and transmits some basic information like usage data to continually improve the product. By enabling you to authorize us to collect the information. NOTE We do not collect or transmit private user data or personally identifiable information. |