The font is so small I can't read it in you tube when I try to view in my foxfire browser ?
fix the font size and the resolution when I am in my Firefox browser
ప్రత్యుత్తరాలన్నీ (1)
there is an option to change font size in Firefox Settings > General
If you scroll down the second main heading is "Language and Appearance" and there is an option to change the preferred font and font size there.
Also, with any page you are viewing, you can zoom in or out using the key combinations "Ctrl +" (zoom in) and "Ctrl -" (zoom out)
Hope this is of some help