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How to surely disable that firefox restores closed tab on next launch. It often and randomisedly restores unwanted tabs.
Wšě wotmołwy (1)
The first step is properly closing Firefox before you shutdown the computer.
Use one of these to close Firefox if you are currently doing that by clicking the close X on the Firefox Title bar, especially if you have multiple windows or Private Browsing windows open to prevent losing tabs in unnoticed windows.
- "3-bar" menu button -> Exit (Power button)
- Windows: File -> Exit
- Mac: Firefox -> Quit Firefox
- Linux: File -> Quit