Some files are simply too big for an e-mail, but with specialized online services like Gmail and Dropbox sharing still works.

The QuickDrop extension gives you access to your Dropbox files and folders from a browser button and lets you upload files simply by dragging and dropping them to Chrome.

The "cloud" is great, until something goes drastically wrong. Sometime on Sunday, online file-hosting service Dropbox pushed out a system update, inadvertently letting anyone log ...