Clearing cache in mozilla firefox
- Click the Menu button in the upper right hand corner of the Firefox window (the one with the 3 horizontal lines)
- Click “Options”
- Click “Advanced” in the left column
- In the “Cached Web Content” section, click the “Clear Now” button
- In the “Offline Web Content and User Data” section, click the “Clear Now” button
- Restart Firefox
Check this video turorial: