Board Thread:Questions and Answers/@comment-26961787-20180912161440/@comment-31265343-20180915044427

UEFI is only for the boot process, and has nothing to do with the amount of memory the OS can support.

Other than allowing you to utilize all 4GB, the 64-bit edition is more powerful because it will allow you to utilize the 64-bit architecture of the CPU (the extended registers etc). You need to also use the 64-bit editions of software, where possible.

Although for browsers, I think they still usually come in 32-bit editions.

Have you kept Chrome updated?