Can you share the URL of the page that has the problem so volunteers can take a look?

http://www.lollypupspetwear.com/#!__purchase

It's fine when opened in explorer, but below image is what it looks like when opened in firefox.

Thanks

Looks fine here on Linux. The page looks zoomed in your screenshot.

Maybe check for issues with HiDPI support for high resolution displays in current Firefox versions.

You can set the layout.css.devPixelsPerPx pref on the about:config page to 1.0 (current default value is -1.0) to restore the behavior of previous Firefox versions.

• http://kb.mozillazine.org/about:config

You may need a larger setting like 1.25 or 1.5 if the current DPI setting is 125%.

So if necessary, adjust layout.css.devPixelsPerPx starting with 1.0 in 0.1 or 0.05 steps (1.0 or 0.9).

• https://support.mozilla.org/kb/forum-response-Zoom-feature-on-Firefox-22

I'm getting the Flashquix/PayPal frames more closely bunched together than you are. I'm not sure why our displays differ.

I see the same as in the screenshot posted by jscher2000.
This is content in a Flash object, so it isn't easy to troubleshoot.
Changing font or zoom settings didn't have much effect.

It is possible that a font is specified that shows differently for you.