Mozilla keeps duplicating last address in additional tab without reason
Whenever I type a new address or even choose to open a link in another tab, somehow Firefox is duplicating this tab opened in a additional tab without control or action from my side.
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Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
- Switch to the DEFAULT theme: "3-bar" menu button or Tools > Add-ons > Appearance
- Do NOT click the "Refresh Firefox" button on the Safe Mode start window