Add-ons or extensions to provide more functionality than a browser, but the add-ons can also cause Firefox becomes slower. Some add-ons can even slow down Firefox to run at start-up even fairly heavy when brwoser was used.
If you feel your firefox seem slow maybe some add-ons that have been installed penyebabmya. Mozilla has released 50 list of add-ons firefox becomes the greatest cause weight at startup.
