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Firefox crashes soon after Log In to Facebook/immediately upon clicking Home in Facebook. Firefox has become slow recently and hangs a lot. Scrolling is jerky.

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I have a mid 2011, Model 12,2. 27 inch, iMac. 2.7 GHz Intel Core i5. Memory: 4GB 1333 MHz DDR3

Things I've tried: Firefox Help > Firefox crashes - Troubleshoot, prevent and get help fixing crashes, Update Software, Refresh/Update Firefox, Turned off Plugins, Update Plugins, Update OS X, Update graphics Drivers, Turned off Hardware Acceleration, Cleared Cookies and Cache, Tested with Safe Mode/Restart with Add-ons Disabled, Created new Places database, Checked RAM for errors with Rember, Deleted duplicated Session Restore files, Checked and I'm not using PAC, Selected All Items in Clear All History.

Crash Reports/Submitted: bp-ceb28798-0767-4584-b790-d8a642150219 2/19/15 3:57 PM bp-707da00d-ddab-4ccb-8b3d-f010a2150219 2/19/15 3:55 PM bp-bf70c0bb-d794-48d4-8c2d-d8eb92150219 2/19/15 2:39 PM bp-b8c6f1d4-6d0a-4a18-9351-c4f322150219 2/19/15 1:42 PM bp-156d77e8-7aa7-4aab-9cd5-888712150220 2/19/15 10:03 AM bp-1760c010-abd8-457c-84f2-5f08f2150219 2/18/15 7:39 PM bp-9237f9e0-179e-4ff2-af0d-54d1b2150219 2/18/15 7:16 PM bp-f0a6c4b5-dda5-46fc-a564-b3b632150219 2/18/15 6:56 PM bp-1f865b92-e4db-4444-9d01-20cf82150218 2/17/15 10:57 PM bp-d98eacb8-f996-40d4-b2d2-bcc812150217 2/17/15 1:56 PM bp-09776bb1-8d64-4b12-97d9-742cc2150217 2/17/15 1:45 PM

I have a mid 2011, Model 12,2. 27 inch, iMac. 2.7 GHz Intel Core i5. Memory: 4GB 1333 MHz DDR3 Things I've tried: Firefox Help > Firefox crashes - Troubleshoot, prevent and get help fixing crashes, Update Software, Refresh/Update Firefox, Turned off Plugins, Update Plugins, Update OS X, Update graphics Drivers, Turned off Hardware Acceleration, Cleared Cookies and Cache, Tested with Safe Mode/Restart with Add-ons Disabled, Created new Places database, Checked RAM for errors with Rember, Deleted duplicated Session Restore files, Checked and I'm not using PAC, Selected All Items in Clear All History. Crash Reports/Submitted: bp-ceb28798-0767-4584-b790-d8a642150219 2/19/15 3:57 PM bp-707da00d-ddab-4ccb-8b3d-f010a2150219 2/19/15 3:55 PM bp-bf70c0bb-d794-48d4-8c2d-d8eb92150219 2/19/15 2:39 PM bp-b8c6f1d4-6d0a-4a18-9351-c4f322150219 2/19/15 1:42 PM bp-156d77e8-7aa7-4aab-9cd5-888712150220 2/19/15 10:03 AM bp-1760c010-abd8-457c-84f2-5f08f2150219 2/18/15 7:39 PM bp-9237f9e0-179e-4ff2-af0d-54d1b2150219 2/18/15 7:16 PM bp-f0a6c4b5-dda5-46fc-a564-b3b632150219 2/18/15 6:56 PM bp-1f865b92-e4db-4444-9d01-20cf82150218 2/17/15 10:57 PM bp-d98eacb8-f996-40d4-b2d2-bcc812150217 2/17/15 1:56 PM bp-09776bb1-8d64-4b12-97d9-742cc2150217 2/17/15 1:45 PM

Endret av cor-el

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There are a few different signatures in these crash reports. It looks like one of them was crashed from a plugin, however you mentioned that disabling hardware acceleration was one of the steps.

There are two places to disable hardware acceleration, in Flash and in Firefox.

For scrolling, it is also possible to turn off smooth scrolling in Preferences > General > Browser