I do this quite frequently with Thunderbird/Firefox on a new WIN notebook or tablet. Takes me about 5-6 min to do so manually.
Options #1: ManuallyBasically, I'd suggest creating a Thunderbird(TB) profile folder in a location where you can easily find it on your PC/laptop. I keep mine in a folder called Mozilla in My Documents.
The procedure is to copy the files and folders within your existing TB profile you want to transfer to your laptop. You can use a USB Flash drive.
With TB not running on your laptop, open the current profile folder, and delete all the folders and files. Then copy and paste the TB folders and files from your USB Flash drive into the empty TB profile folder on your laptop. Re-start TB, and it should be identical to your PC.
Option #2: Using an ExtensionDownload and install the TB Extension:
ImportExportTools.
Make sure to install the extension to both your PC and laptop. You will now have a new option in TB Menu > Tools > ImportExportTools.
On your PC, click
Tools > ImportExportTools > Export profile and follow the prompts. You can save it to a USB Flash Drive.
Conversely, on your laptop, click
Tools > ImportExportTools > Import profile and follow the prompts.
I've never actually used ImportExportTools extension for exporting/importing TB profile. But should do the trick to mirror your Thunderbird PC profile onto your laptop.