Hello,

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
• On Mac you can open Firefox 4.0+ in Safe Mode by holding the option key while starting Firefox.
• On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
• Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

The problem still remains in Safe Mode. I do not have the problem if I use IE rather than Firefox.

Interactive websites freeze in Firefox unless I'm moving the mouse.

hello, this is unfortunately a known regression in firefox 25 that is affecting a small portion of users, for reference please refer to bug #933733.

your best option is probably to downgrade to firefox 24 at the moment until the issue gets resolved.

Install an older version of Firefox

hey, just to keep you updated - there is now a fix available for firefox 25, which should address the particular problem of pages not loading unless the mouse is moved.

if you have downgraded to firefox 24 to work around the issue, please go to firefox > options > advanced > update and turn automatic updates back on. then go to firefox > help > about firefox which should trigger the update to firefox 25.0.1. in case you need to download the setup file for firefox 25.0.1 separately you can do so from https://www.mozilla.org/firefox/channel/#firefox

The better download link for Firefox 25.0.1 is at http://www.mozilla.org/en-US/firefox/all/ versus that channels page mentioned.