Changing fonts in Firefox

1. Open the 'Edit' menu with the mouse or press 'Alt'+'E'.
2. Click on 'Preferences', or press 'n', to open the Options dialog box.
3. Make sure that the 'General' option is selected - if not either click on it or press 'Tab' until it is highlighted (in blue) and then press the 'Enter' key.
4. Click on ' Fonts & Colors ' , or press ' F ' , to open the ' Fonts and Colors ' dialog box (see Fig 1 below).
5. Click on the box next to ' proportional: ' and choose your font type  serif or sans serif or press ' Tab ' until the option box is highlighted, use the arrow keys to expand it and choose your font type and then press ' Enter ' to select it.
6. Next choose your specific font by clicking on the ' Serif: ' or ' Sans-serif:'  drop down menus depending on what font type you selected for ' Proportional ' and scroll down and select the font you want or ' Tab ' into the relevant  drop down menu ( ' Serif: ' or ' Sans-Serif: ' and use the arrow keys to move up and down the list, once the font you want is highlighted press ' Enter ' to select it.
7. Click on ' Always use my:' 'Fonts ' checkbox, or tab to this checkbox and press the ' Spacebar '.
8. Click ' OK ' button or press ' Enter ' .
9. Click ' OK ' button or tab to ' OK ' button and press ' Enter ' .

Fig 1

Note: If this does not work it could be because your computer settings cannot be changed due to local IT policies - contact your local IT support for further help.