Mozilla Firefox stores all your settings and add-ons in a profile folder. Each user account on the computer has its own separate profiles folder. Firefox stores every piece of personal data it remember in this folder, including your bookmarks, history, cache, saved passwords and other information. You can transfer your Firefox configuration, including your settings and add-ons, to a new computer by copying the profile folder to the new computer.
Step 1
Close Firefox if it's running on the old computer.
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Step 2
Click "Start" on the old computer, type "%Appdata%" into the search box at the bottom of the Start menu and press "Enter."
Step 3
Right-click the "Mozilla" folder and click "Copy."
Step 4
Plug a USB flash drive or other removable media device into your old computer.
Step 5
Navigate to the USB flash drive or other removable media device, right-click inside it and click "Paste."
Step 6
Unplug the USB flash drive or other removable media from your old computer and plug it in to your new computer.
Step 7
Close Firefox if it's running on the new computer.
Step 8
Right-click the "Mozilla" folder on the removable media device on your new computer and click "Copy."
Step 9
Click "Start" on the new computer, type "%Appdata%" into the search box in the Start menu and press "Enter."
Step 10
Right-click the "Mozilla" folder in the Roaming folder that appears, if there's one already present, and click "Delete." This process removes all Firefox settings and add-ons on your new computer so you can copy over the old ones.
Step 11
Right-click inside the "Roaming" folder and click "Paste."
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