Millions of users use Mozilla Firefox as a private browser to navigate various websites, emails, downloads, etc. It may take a long time to open, so you must focus on the few troubleshooting steps mentioned below.
● Delete recent history
● Turn on Start-up Preferences
● Delete duplicate files restore on sessions
● Update Plugins in Mozilla Firefox
● Check Antivirus software interference
After following the above steps, you can resolve it successfully. If it is not decided, you must call Mozilla Firefox customer care to rectify it.