Browser Support • Re: Why is Pale Moon so slow?

The issue with slowdowns caused by certain sites is because they create a complex document tree that is interlinked with itself. It becomes impossible for the garbage collector to trace and clean up, so it gives up and even if you no longer use the website, it will remain in memory and the garbage collector still tries to clean it up. The "ghostbuster" tries to address this but it's not really successful in the case of the biggest culprits due to the sheer size of allocations involved with those sites. I've been trying to find a solution for this and I have some things I want to try when I have time to do so, but so far I've not had the opportunity (among other things because of the deluge of sec bugs I have had to audit and pressing web compatibility problems).

Other browsers are able to recover better because they "junk the entire car when the ash tray is full" to make a really outdated analogy. If Dactyloidae is using e10s on a UXP basis then that is really dangerous because there are literally thousands of vulnerabilities in e10s that can cause exploitable crashes. So caution strongly advised.