[Montana_Sam]

Most browsers are "zoomable". Simply hold the key down and roll the mouse middle (roller) button forward to "zoom in" (increase the font size), or roll it back to "zoom out" (decrease the font size).

Most browsers have an "Appearance" section in the settings where the user can modify defaults. This browser, Brave (a Chromium derivative) doesn't have an option to change the default font. But Firefox does.

[Montana_Sam]

Actually, Brave DOES allow the user to select a different default font. I just changed from Serif to Sans (Arial-style).

Chromium based browsers (Brave, Edge, Dissenter, etc.) most likely all have that feature.

[Captain Compassion]

Hold the “Ctrl” key down on your keyboard and use the wheel on your mouse to increase or decease the size of the font.