Open tabs in order от developer.waieight.

“Open tabs in order” is an Add-on that reduces browser load by loading tabs sequentially when multiple tabs are opened simultaneously.

This Add-on is designed to solve the problem where opening many tabs at once causes all tabs to load simultaneously, slowing down your PC. Normally, in Firefox, opening multiple tabs at once causes each to start loading simultaneously, placing a heavy load on memory and CPU. Using “Open tabs in order” allows tabs to load sequentially, reducing consumption of system resources.

This Add-on adjusts loading timing by pausing tabs, providing a comfortable browsing experience. It is especially useful for users who frequently open large numbers of pages at once, such as from bookmark folders.