Mozilla is working on many things at the same time. What gets picked up by the press is not a representative sample. Some things being worked on that will imp

Mozilla is working on many things at the same time. What gets picked up by the press is not a representative sample. Some things being worked on that will improve responsiveness include off main thread compositing, running content in a separate process, network cache rewrite, generational garbage collection, incremental cycle collection, and many other things. These are all large complex projects that take time, unfortunately.