Firefox update 22 doesn't work as before with nosquint

Question

After the Firefox update, my web pages are up to twice the size they were before the update. NoSquint shows the size is up to 200%. None of my old tabs show a page in a readable size. I can change the size of each page but if I restart Firefox, all of my pages are huge again. If I disable NoSquint, page size is much more reasonable but I still need to make slight adjustment for each page. I've also gone into Firefox/Options/Content/Fonts & Colors and tried different settings without success. Ideas?

Answer 1

Thanks jscher 2000 for the explanation that Firefox 22 adjusts the page zoom levels according to the Windows settings. I tried all options you provided and the "about.config" solution works best for me. I already use the 125% font size as well as the Theme Font & Size Changer add-on (it's great!). The following might help others:
I first disabled NoSquint and found the new default size, combined with site-specific Ctrl+ and Ctrl- worked but I always seem to use the site specific Ctrl+ and Ctrl-. I like the NoSquint set it and forget it feature.
When I tried the "about.config" solution in combination with NoSquint, all of my pages look just like they used to before the Firefox update and only rarely need the site specific Ctrl+ and Ctrl-. Thanks!