hello, you appear to be using a very outdated version of firefox - please start by updating firefox to the latest version.

you could then try to press ctrl+0 ('zero') while you're on the page in order to reset the zoom level or in case this doesn't work also go through the other common troubleshooting steps at Websites look wrong or appear differently than they should.

Type about:preferences<enter> in the address bar.

amenex said

Trying to watch web animation. Image is high resolution but firefox only shows it as full resolution - way too big for the window. I tried getting the zoom add-on, but that zooms only the text. There's no place on the firefox right-click window for adjusting my preferences. I'm running Windows 7 on a Lenovo T420. 4GB RAM

After the recommended upgrade to the latest version of Firefox, the zoom app works on the whole webpage, not just its text. I had to recreate the animation in order to achieve this, but that was not difficult. Works OK now.

Note that Firefox has a "Zoom Text Only" setting the the "View > Zoom" menu.

• http://kb.mozillazine.org/browser.zoom.siteSpecific
• http://kb.mozillazine.org/Zoom_text_of_web_pages

If a plugin is used to show the animation then zooming way not work as well.