To remove the red screen, try the following steps:
Force quit your web browser by pressing Ctrl+Shift+Esc (Windows) or Command+Option+Esc (Mac) and selecting your browser from the list of open applications, then clicking "End task" or "Force quit."
Clear your browser cache and cookies. In Firefox, click the three horizontal lines in the upper-right corner, select "Library," then "History," and finally "Clear Recent History." In Chrome, click the three dots in the upper-right corner, select "More tools," then "Clear browsing data."
Scan your computer for adware and malware using reputable anti-virus software such as Malwarebytes or Norton.
If the red screen persists, try resetting your browser settings to their default values. In Firefox, click the three horizontal lines in the upper-right corner, select "Help," then "Troubleshooting Information," and finally "Refresh Firefox." In Chrome, click the three dots in the upper-right corner, select "Settings," then "Advanced," and finally "Reset settings."
If none of these steps work, you may need to seek professional assistance from a computer technician.
Regards,
Rachel Gomez