Clearing Cache in Firefox

To clear the cache in Firefox simply click tools at the top of your browser and then go to "clear recent history" as shown below.

You will then see the below in a "pop-up" make sure the "Time range to clear" is set to everything and the boxes are ticked as the below image illustrates.

Click "Clear now" and wait patiently as it performs the clean up. When it is completed simply close down your browser and restart it for the changes to take effect.