Since installing Firefox, my number pad on my laptop & my Cannon printer don't work

Acer aspire5742 G
using Window 7
Cannon printer MX880 series - whether in wifi mode or plugged in to pc get message printer off line.
All plug in properly new cartridges put in properly but cartridge lights are shining.
Thanks Roseskick

'''Try the Firefox Safe Mode''' to see how it works there. The Safe Mode is a troubleshooting mode, which disables most add-ons.''
''(If you're not using it, switch to the Default theme.)''
* You can open the Firefox 4.0+ Safe Mode by holding the '''Shift''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
''Don't select anything right now, just use "'Start in Safe Mode"''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shift key) to open it again.''
'''''If it is good in the Firefox Safe Mode''''', your problem is probably caused by an extension, and you need to figure out which one.
Please follow the [[Troubleshooting extensions and themes]] article for that.
''When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.''

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Hm. I was not aware Firefox 4 disabled this. Then again, I'm still using 3.x.
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Did you create a new profile folder for that beta? 
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See [[Profiles#How_to_find_your_profile|Profiles - How to find your profile]]
Linux: ~/.mozilla/firefox/Crash Reports

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*https://support.mozilla.com/kb/Safe+Mode

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Since installing Firefox, my number pad on my laptop & my Cannon printer don't work

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