Scrolling on Forefox has stopped?

Mar 30, 2010
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NW Wiltshire England
Your Mac's Specs
Mid 2010 MBP 13, 8 gig mem, 2 int disks 500gig SSD, 1Tb SSHD . 2010 iMac, 8 gig, 2 Tb SSHD. iMac M1
MBP running Mavericks. Forefox is my browser and this morning it suddenly stopped scrolling using either the track pad or the scroll wheel on the mouse this morning.

Scrolling is OK on all of the other programmes, including Safari.

If I 'quit' Firefox and restart it the scrolling works fine until I go to another page or refresh then the only way to scroll is with the scroll bars, side and bottom, which is a real pain.

Any ideas would be welcome!!

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