How to Share your Screen in Firefox
To allow a student to share their screen, you must assign them as a presenter in BBB. Please see the How to Assign a Presenter article.
Screen sharing is currently not supported on mobile devices. To share a screen, the presenter must use a desktop, laptop, or Chromebook.
Use screen sharing to show viewers dynamic content or content that cannot be uploaded into the BigBlueButton as a static PDF; you can share your entire screen or an application window from your local desktop or laptop device.
Safari, Internet Explorer, and Edge browsers currently do not support WebRTC enabled screen share.
By default, the first Moderator to enter the BigBlueButton session is allocated the presenter role capabilities; if you are a viewer, you will need to request presenter status from the moderator.
To share your screen, please follow the instructions below:
- Log in to Fullmind’s Learning Management System at https://lms.fullmindlearning.com.
- Click "Join Class" to launch your session.
- Be sure to open any applications or additional browser windows you wish to share beforehand.
- Select the Screen Share icon found in the media bar of the BigBlueButton interface.
- You will be prompted to choose the Window to Share [1] from the drop down.
- If you do not see the window you would like to share, it may not be open. Be sure to open the application or window you intend to share, then restart the screen sharing. You should see the window in the list of available options.
- Once you have configured the screen share to your preference, select Allow [2] to begin sharing with attendees.
What Users See

Users will see the screen share displayed in the presentation area of the BigBlueButton interface. It no longer loads into a separate window.

When the presenter is in BigBlueButton, screen sharing will duplicate to create a mirrored broadcast of the screen - DON’T WORRY, as this is not what viewers see when in another tab or an application window.
IMPORTANT TO KNOW:
- When sharing your entire screen, users will see your screen even when you navigate to another browser or application window. This setting is recommended if you plan to use several applications and do not wish to reconfigure the screen share with each change.
- When sharing an application window, users will only see the application that was selected; if you navigate outside the chosen application, then the users will not see these actions. This setting is recommended if you plan to use the same application. Note that sharing an application window also requires less bandwidth than sharing your entire screen.