Follow these steps to import into Fusion360:
Import Symbols and Footprints
Launch Autodesk Fusion 360.
From the main menu next to the Data Panel, click on File > Open
Then click Open from my computer.
Select the .lbr file downloaded from SnapEDA and click Open.
The library will be loaded and from the Device tab, you will be able to see the symbol and the footprint, double-click to open them.
Once you're satisfied with the symbol and footprint, click the Save icon
on the main menu or go to File > Save.
**NOTE: This will save the library to the Library Manager. If you did not save it, you will not find the imported part on your Library Manager.