I have installed a plugin called 'WordPress Font Uploader Free' which is working perfectly on Chrome and almost Mozilla.
When you load up the site on Mozilla, the font is the original wordpress font, and then when clicking on the homepage logo or entering another page, it then runs the plugin's function.
This seems to work instantly using Chrome.
Do I need to put a call function to instantly load this plugin in Firefox?
It seems as though it is loading up after the first interactive click on the site to another page for example.