What issue do you have with Firefox? Most things are fixed by community except the addons in the new version 115-esr, which happened during a bad decision on Firefox 109 (non esr). Using 102-esr works well (but is not supported anymore).
I think it’s more important for Purism to focus on their own product since here’s enough work that have to be done. And they’re doing so, it just need some time.