Short Version:
Windows: ctrl + F5
Mac/Apple: Apple + R or command + R
Linux: F5
Long Version:
Google Chrome
Windows/Linux/ChromeOS:
- Hold down Ctrl and click the Reload button. Be careful not to hold ⇧ Shift on Chromebook, or it will rotate the internal display.
Windows/Linux:
- Press Ctrl+F5.
Mac:
- Hold ⇧ Shift and click the Reload button.
- Or, press ⌘ Cmd+⇧ Shift+R.
Internet Explorer
- Press Ctrl+F5.
- Or, hold the Ctrl key and click the Refresh button.
Safari
Hold down ⇧ Shift and click the Reload button on the toolbar.[problematic]
Mozilla Firefox and Related Browsers
Windows/Linux:
- Press Ctrl+F5.
- Or, press Ctrl+⇧ Shift+R.
Mac:
- Hold down ⇧ Shift and click the Reload button.
- Or, press ⌘ Cmd+⇧ Shift+R.
SOURCE: Scratch WiKi