Steps to stop Firefox from opening multiple tabs:
- Select Settings from the menu button.
- Navigate to the Tabs area of the General panel.
- Ctrl+Tab cycles across tabs in the order they were last used: If you wish to use the Ctrl + Tab keyboard shortcut to switch between open tabs in the order you viewed them rather than the order they show in the Firefox window, select this option.
- Deselect this setting if you wish to use Ctrl + Tab to move to the next tab and Ctrl + Shift + Tab to switch to the previous tab.
Read More : How do you set Firefox as the default browser?
