Hi and welcome MechaTama,
Under Menu>Options>Content>Fonts and Colours> Advanced, try ticking 'Allow pages to choose their own fonts instead of my selection above'.
about:preferences#content
If it still fails try disabling 'Use hardwar...
Under Menu>Options>Content>Fonts and Colours> Advanced, try ticking 'Allow pages to choose their own fonts instead of my selection above'.
about:preferences#content
If it still fails try disabling 'Use hardwar...