Small Text Big

Small text on a screen of device takes less pixels than larger text, causing loss of clarity and definition of text. If this small text is enlarged, the page and website becomes easily readable (especially for far-sight condition of eyes).
This extension enlarges text, makes text colors a contrasting black / white color and a few subroutines.
Font size within threshold is enlarged inversely with font size. That means small text made bigger than large text.
Text contrast can be increased by the 'Strength' slider, with high positive values making text more black / white and negative values keeping text color unchanged.
The strength slider also determines the Zoom %, with default zero strength giving 175% (1.75) zoom value.
All text within size of Threshold setting is increased in size with text closer to Font Threshold size increasing less than text much lower size than Threshold, depending of Font Increase % setting.