First is Clear the cache. Manually delete the cache on the browser by clicking the Tools menu at the top of your screen. From the Tools menu, select Clear Private Data. Go to Settings and then reduce your cache size to around 50 MB.
Remove toolbars and plug-in. Toolbar and plug-in will make your surfing on the Internet becomes much easier, but if Firefox gets overloaded with add-on, it will make it run more slowly. It will be better to cut some features, especially if you rarely use it.
Clean the registry. Registry is the central database on your computer. It’s including all information necessary for the computer to run, including your web browser. Of course, your computer registry will also contain many files and processes associated with your Firefox browser. Over time, these files become damaged or corrupted due to overload and obsolete registry entries. This will make the registry becomes too crowded, and then slowing the Firefox browser. To clean your registry can be done by using registry cleaner software, because it is very difficult to clean the registry yourself unless you are a computer expert. But with the right software, you can scan your entire system and make the Firefox browser to be faster in minutes!
