How does this translate to real use, as in actually loading the pages and having a couple dozens extensions ? The ability to open 5-10 times more tabs than I u

How does this translate to real use, as in actually loading the pages and having a couple dozens extensions ? The ability to open 5-10 times more tabs than I use is quite and edge case that mozilla usually doesn't care about, but the real question is what is the point of this when it comes with making firefox totally useless for said use case by dropping support for extension that make it practical or useful.