Time to change your password. You need to change your passwords at regular intervals for safety, be it facebook or any other account. Changing passwords would ensure your safety against the facebook virus.
8. Download CCleaner
Go to your browser and download CCleaner and clean the cache. Incase if your device already has CCleaner or similar antivirus installed. Clear your cache along the temporary files from the system.
9. Reset current browser
Reset your current browser and then resume to your work again.
Since the viruses are always ones unexpected guests, it is advisable to have updated antivirus installed on your device. This will prevent your device from a panic attack and keep your important data safe from getting misused.