I have lots of PDFs and other documents on my hard drive, many of which aren't online anywhere.
If I know something is online, I can use Google.
If I know something is on my drive, I can use Windows Search and find it.
But is there a browser extension or external tool that would let me search for a phrase and show me Google results side-by-side with results from my own hard drive? Actually, if I could also search my GMail, Google Docs, etc at the same time without mirroring them to my drive first, that would be even better.