Recently Firefox is not starting in my home laptop. I start it in various ways (click the icon, start menu, start menu Run, command line, windows explorer) but nothing happens visibly. I monitored with task manager, but firefox.exe never even shows up as a process. I have set task manager refresh frequency as high. I tried to run in firefox in safe mode but nothing. From command line if I run firefox.exe -h, the task manager shows the process for a second or two and gone. But just firefox.exe doesn't show this.
I tried reinstalling, uninstall and reinstall, reboot, but no use. This happens only from my user account. If I switch user to another couple of accounts (admin and non-admin), the browser starts without problem. I searched the internet but most of the problems mentioned about firefox not appearing but atleast showing up in the task manager. I tried renaming the profile directory (in case something wrong with the profiles) but no use.
One thing noticed with profile directory, when I tried renaming the directory in windows explorer (F2, change name, Enter), the name went back to original name (without any error message or warning). I couldn't change any directory in AppData\Roaming in explorer. I had to do that from command line. Could this be an issue?
Any help is appreciated.