Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
• Do NOT click the Reset button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
• https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

What Autofill program are you using?

Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.

kiapete1911 said

Autofill crashes my browser. Say if i try to sign in to my email the auto fill box pops up, if i move my mouse over it it crashes my broswer If i press the down arrow it some times works and fills out my email or it will crashes. If i type every thing out and use the tab key to go to the next box it works. How ever it does not work on paypal that just crashes my browser what ever i do as soon as the text box is selected. I have formatted my PC it worked for a while but started again, i only have a few programs installed that do not effect the browser, i have diasbled all my addons, cleared my browser history and cache. all my hardware is installed properly and my software is uptodate.

It was hardware acceleration that seems to of caused the issue, after turning it off every thing started working again

That was very good work. Well Done.