My eyes are bad, I use 150% font ... never had this before in my older XP 'puter
Hmmmm.... I don’t know if this will help you, but
You can ZOOM IN/OUT from your browser by pressing CTRL and + (to enlarge or zoom in) or CTRL and - to zoom out(make smaller). CTRL and 0 will reset to NORMAL.
Also you say you use 150% font, which means you mean the system font settings. Browser settings are usually done by setting FONT SIZE. They are two different things.
Try setting your system fonts back to a smaller percentage , see if that corrects things.
Then try changing the font size in your browser (tools/options/content).
If all else fails, do the CTRL+ or CTRL- to adjust things to make it readable.
Hope this helps.