Operating system: win 10

Operating software: Firefox browser

1, open the Firefox browser in the computer, as shown in the following figure:

2. Click more options in the upper right corner, and then click Extensions and Themes, as shown in the figure below:

3. Search for learning components, as shown in the figure below:

4. Click on the online course gadget, as shown in the figure below:

5. Click Add to firefox, as shown in the following figure:

6. Enter the learning webpage and click Online Classroom, as shown in the figure below:

7. Learning the online class will automatically play the video to brush the class, as shown below: