Firefox
Firefox
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This article only applies to Firefox on Windows.
If you leave Firefox open when Windows shuts down, Firefox may automatically re-open with your previously opened tabs the next time you start Windows. Here's how to disable the feature.
Prevent Firefox from starting automatically
Warning: Changing advanced preferences can affect Firefox's stability and security. This is recommended for advanced users only.
- Type about:config in the address bar and press EnterReturn.
A warning page may appear. Click to go to the about:config page. - Search for toolkit.winRegisterApplicationRestart.
- Click the Toggle button next to it, to set its value to false.
There's no need to restart Firefox; the changes take effect immediately.