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FireFox
If you are signed into the Firefox browser you can simply sign into the browser on your new system and sync your settings.
Export and Import Bookmarks
Click the three lines to open the menu, select Bookmarks
Click Manage Bookmarks (at the bottom)
Select Import and Backup then choose which action you wish to perform
Export and Import Passwords
Click the three lines at the top right and select Passwords
Click the three dots at the top right of the window and select Export logins...
To import navigate to about:config in the address bar and click Accept the Risk and Continue
In the search bar enter signon.management.page.fileImport.enabled
Change from False to True by clicking the two little arrows
Restart browser
Click the three lines and select Passwords
Click the three dots at the top of the page and select Import from a File
Select the File you previously exported and click Open