If you are a developer, I encourage you to create a test case that reproduces the issue reliably and then profile Firefox in that test case. If you feel a bit a

If you are a developer, I encourage you to create a test case that reproduces the issue reliably and then profile Firefox in that test case. If you feel a bit apprehensive about doing so, it is worth mentioning that profiling Firefox is not terribly hard and you can share the profile with Firefox developers.