I've had the unload flag enabled in about: config for months.
Haven't used the update yet but there are several related flags to change the appearance and behavior of unloaded tabs in there as well.
Tab groups are another thing I was using for a while, they still hide some flags to enable some options. Again, there are some neat flags associated with this in about: config.
There are also some hidden peefs for backing up your data that would be cool if they pushed them.
Sometimes it fewls lkke I probably spend more time tweaking flags than I do using the browser.
I use the release version, not nightly or developer. But you can usually find some future features in there. Some good, some not. YMMV.
As always - Use caution.
If there is no due process for immigrants, there is no due process for anyone.
If there is no due process there is no law.
Where there is no law there is only force.
The supreme court has declared themselves, and every other person, be given no due process to deport.
What will come should not surprise anyone.
What will come can only be met with equivalent response.
The US of A is a failed state.