Many websites are not displayed properly, overlapping words etc., can I adjust the browser settings?
Lots of sites do not appear properly, ie words and characters overlap, pop ups not complete.
Opaite Mbohovái (1)
Reset the page zoom on websites that look wrong: "View > Zoom > Reset" (Ctrl + 0 (zero)) See http://kb.mozillazine.org/Zoom_text_of_web_pages
If you increased the minimum font size then try a lower setting (default is none) as a too high value can cause issues like you described.
Tools > Options > Content : Fonts & Colors: Advanced > Minimum Font Size
Tools > Options > Content : Fonts & Colors: Advanced > "Allow pages to choose their own fonts, instead of my selections above"