If you are a Firefox user like me then you got to read this article. Firefox has recently released a list of the slowest performing add-ons that can slow down the start up of your browser significantly.
Add-ons provide many useful features and functions, but they can also cause Firefox to become slower. Some add-ons can even slow Firefox to a crawl and make it difficult to use for regular web browsing. If you think add-ons might be the reason Firefox is lethargic, check the list below for some of the biggest bottlenecks. And remember, for best performance you should disable add-ons that you no longer use regularly.
You should definitely check if you use any of the above displayed add-ons, and disable or remove them if you don’t use them anymore.
Check the details at Firefox.