The Firefox browser now has a built-in page translator that works even without the Internet::Mozilla has announced the release of an update to its Firefox browser. In version number 118, users will find a significant innovation - a built-in translator
Try Tab Suspender. With it you can open as many tabs as you care to, it will auto-suspend tabs unless you choose tabs not to suspend. This way you can open as many tabs in as many windows as you want, even suspend all the tabs in one window or many windows.
One Tab is even better, it puts all open tabs into 1 tab as a long list, then you can open those as needed in new tabs or windows.