We’re working on a thing to make Firefox start faster! It appears to work! Here’s a video showing off a before (left) and after (right):
For the past year or so, the Firefox Desktop Front-End Performance team has been concentrating on making improvements to browser startup performance.
The launching of an application like Firefox is quite complex. Meticulous profiling of Firefox startup in various conditions has, thankfully, helped reveal a number of opportunities where we can make improvements. We’ve been evaluating and addressing these opportunities, and several have made it into the past few Firefox releases.