>Unfortunately Firefox is terribly slow in unpredictable places. I periodically try to find out what exactly makes it work slow in Firefox. For example this cha

>Unfortunately Firefox is terribly slow in unpredictable places. I periodically try to find out what exactly makes it work slow in Firefox. For example this change improved twitter.com loading from ~30s to ~1s. His change[0] was changing array population from repeated concat to push. This is not an unpredictable hot spot but a developer not knowing his tools. Common sense is not premature optimization. [0] https://github.com/darkreader/darkreader/commit/09b24d052e07fd4492575cd01da2ac1fef51cf6c?diff=split https://github.com/darkreader/darkreader/commit/09b24d052e07...